Scylla compaction strategy hh at master · gubaojian/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · LifeIsStrange/scylla For example in Sized Tier Compaction Strategy (STCS), large sstable compaction can take time, allowing smaller sstable to be compacted at the same time. hh at master · sharpe5/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Log Structured Merge (LSM) tree storage engines are known for very fast writes. ScyllaDB implements the following compaction strategies in order to reduce read amplification, write amplification, and space amplification, which causes bottlenecks and poor performance. hh at master · sis-labs/scylla a) During tables compaction Q7: tombstone and underlying data can be removed if they are compacted together to a new SSTable, right? b) During tombstone compaction when only one SSTable itself got compacted to remove data. These scripts can finish running independently and run for different periods of time. hh at master · damsallem/scylla 4 min to completeThe cassandra-stress is a tool for benchmarking the ScyllaDB database. hh at master · 5GApp/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. This way, writes due read repairs, or comp Could this trigger anything, that might result in this weird memtable-compaction above? From the logs: Sep 26 16:22:30 o-p-L3-3 scylla[1381236]: [shard 5:stmt] lsa - Standard allocator failure, increasing head-room in section 0x604006144670 to 2048 [B]; trace: 0x645df8e 0x645e5a0 0x645e888 0x215033f 0x20f504e 0x20b6c0c 0x20b7000 0x1caeb23 0x1cadc83 NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · jackivanov/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · maximmai/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Depending on compaction strategy, disk Let’s go through a brief history of compaction strategies. This is true for ScyllaDB as well as other databases like Datastax One that allows you to use your storage much more efficiently? Enter ScyllaDB’s unique Incremental Compaction Strategy (ICS). hh at master · sis-labs/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Leveled NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Yo. Admin Procedures and Tools 9 Topics | 3 Quizzes Nodetool and Logs In ScyllaDB, Leveled compaction (LCS) works very similarly to how it works in Cassandra and Rocksdb (with some minor differences). In the scylla. hh at master · bsphere/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. This way, writes due read repairs, or comp NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · raymond-xu/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. See Compaction Strategies. hh at master · tanxiaobing-hl/scylla Ideally, operators should select a compaction_window_unit and compaction_window_size pair that produces approximately 20-30 windows - if writing with a 90 day TTL, for example, a 3 Day window would be a reasonable choice ('compaction_window_unit':'DAYS','compaction_window_size':3). hh at master · tomer-sandler/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · TsaiJin/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Hot Network Questions Does the twin paradox hold in a That is why it is default compaction strategy out-of-the-box and is suitable for majority of workloads. We have a Scylla Enterprise feature, Incremental Compaction Strategy, that is much more suited to run comfortably at 70% disk utilization. ICS solved the temporary space requirement issue in STCS, however, it didn’t solve the space Apache Cassandra’s four traditional compaction strategies, Size-Tiered, Leveled, Date-Tiered and Time-Window have been implemented in ScyllaDB using the same heuristics that Apache Cassandra uses. Consistency Level (CL)¶ NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Over time, we will have many separate sstable files on the disk. hh at master · kylerudy-imvu/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. This LSM tree structure is used by ScyllaDB to immutable Sorted Strings Tables (SSTables) on disk. Incremental Compaction Strategy . We will also introduce a new compaction strategy that we designed as a lesson from the existing compaction strategies by picking the best features of the existing strategies while avoiding their problems. When a materialized view is created, it does not inherit its base table compaction strategy settings, because the data model of a view does not necessarily have the same characteristics as the one from NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Space overhead in Size-Tiered Compaction Strategy (STCS) A compaction that runs on behalf of a table that uses STCS potentially has a 100% space overhead. It covers: Bloom Filters, the Read and Write Path, Storage – Log-Structured Merge Tree, Compaction Efficiency, and provides a Compaction Strategies Overview. ScyllaDB Deployment Best Practices: Hardware, Storage, Cores and Number of Nodes. Example: When Time Window Compaction Strategy (TWCS) estimates if a particular SSTable can be deleted it is going to treat expired data similarly as a tombstone: Installation details Scylla version (or git commit hash): 2. NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Cassandra Compaction for Write and Read use cases. It covers the ScyllaDB Write Path, Reads, SSTables, why compaction is needed, and the basics of how compaction works. Per-cpu compaction: In Scylla, each CPU is responsible for its own shard (collection of sstables). hh at master · devboxos/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Usage. hh at master · jazeltq/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. java ScyllaDB is flushing memtables to SSTable data files for persistent storage. Changing compaction strategies, and re-writing all of your current tables will require twice as I didn't find any good documentation on how the compaction strategy should be configured (what parameters to take into account) so I just decided to do it like this: compaction = {'class': 'TimeWindowCompactionStrategy', 'compaction_window_size': '7', 'compaction_window_unit': 'DAYS'} Definitely not sure that this is correct NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. This is done using compaction. ScyllaDB Getting Started. properties file edit the rack and data-center information. Note. If you want a short overview of how leveled compaction works in Scylla and why, I suggest you read my Write Amplification in Leveled Compaction blog post. Scylla implements the following compaction strategies in order to reduce read amplification, write amplification, and space amplification, which causes bottlenecks and poor performance. hh at master · penberg/scylla Scylla leads the pack, processing from 2x to 5x more requests than either of the Cassandras. 1. hh at master · cloud-architecture/scylla The cassandra-stress is a tool for benchmarking the ScyllaDB database. hh at master · maniacs-db/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. For example in Sized Tier Compaction Strategy it generates the /etc/scylla. At first I thought that we should use TimeWindowCompactionStrategy (TWCS): if the time window is 1 day, it will basically mean that we'll have per-day sstables, which makes sense to me; but then I found out that various docs say that TWCS isn't a good fit for never-expiring data. hh at master · mkaurkovska-ledger/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Changing the compaction strategy doesn’t require a node to restart. Note that iotune has known issues benchmarking HDD storage. Procedure¶ Verify what the Join us at ScyllaDB University Live, instructor-led, online, hands-on, training sessions | January 29 This lesson covers: Size Tiered Compaction Strategy (STCS), Leveled Compaction Strategy (LCS), how they work and when to use them. Time-window Compaction Compaction strategy¶ A compaction strategy is what determines which of the SSTables will be compacted, and when. We know, we have a different type of compaction strategy in apache cassandra and ScyllaDB and their use cases. Installation 1 Topic | 1 Quiz Installation. Date-tiered compaction strategy is now available in ScyllaDB 1. For example, Ec2MultiRegionSnitch: NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Memtables are periodically flushed to a new sorted file called an sstable. S301: ScyllaDB Operations Compaction Strategies Size Tiered Compaction Strategy (STCS) Deep Dive. There are very limited cases where you would choose The optimal compaction strategy based on the workload delivers the best Cassandra compaction performance for both compaction itself and for querying. Hello! I wanted to ask for some suggestions on what compaction strategy to use for my use case. You’ll learn why ICS will become the new standard for compaction, including an overview of how much disk space you can save with ICS. hh at master · ilo-repo/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. It all started with Size Tiered strategy (STCS), which is optimized for writes. Transcript Previous Lesson. This command is usually used to stop compaction that has a negative impact on the performance of a node. The exceptions are using TWCS for true time-series use cases and LCS for very read-heavy with hardly any writes. hh at master · farodin91/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. When compaction operations o ScyllaDB’s default compaction strategy, which was also the first compaction strategy introduced in Cassandra (and still its default today), is It starts by giving an overview of the compaction process and how it works. These Compaction merges several SSTables into a new SSTable, which contains only the live data from the input SSTables. S301: ScyllaDB Operations Compaction Strategies Replica level Write/Read Path and Intro to Compaction. It can also help with sizing and SLA estimations. 4 and above). Size Tiered and Leveled Compaction Strategies STCS + LCS. hh at master · kxzy1990/scylla Join us at ScyllaDB University Live, instructor-led, online, hands-on, training sessions | January 29 Size Tiered and Leveled Compaction Strategies STCS + LCS. hh at master · veramine/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. The compaction settings can make a huge difference. Space overhead in Choosing wrong compaction strategies can hurt the performance of an application. A reason to change the compaction strategy can be performance tradeoffs (disk space usage, read and write amplification). hh at master · NeightY/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · junneyang/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · krisnova/scylla Compaction¶ The process of reading several SSTables, comparing the data and time stamps and then writing one SSTable containing the merged, most recent, information. STCS needs a lot of temporary space. It then goes on to cover the different compactions strategies: Size Tiered Compaction Strategy (STCS), Leveled Early in 2020, Incremental Compaction Strategy (ICS) came to the rescue. hh at master · blockarraygroup/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. This results in wasted disk space and affects read performance. hh at master · odaira/scylla ScyllaDB’s internal developer conference and hackathon was very informative and productive. hh at master · NeightY/scylla Installation details Scylla version (or git commit hash): 2. hh at master · criteo-forks/scylla PRESENTATION TITLE ON ONE LINE AND ON TWO LINES First and last name Position, company Time-Window compaction strategy (cont. Leveled Compaction Strategy (LCS) Deep Dive. hh at master · linux-on-ibm-z/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Due to some performance issues, I want to change the compaction strategy of certain tables from LCS (Leveled Compaction Strategy) to STCS (Size-Tiered Compaction Strategy). hh at master · rajatbehl/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Leveled Compaction Strategy . hh at master · fdv/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. For example: endpoint_snitch: GossipingPropertyFileSnitch. ScyllaDB is an Apache Cassandra-compatible NoSQL data store that can handle 1 million transactions per second on a single server. Enter ScyllaDB’s unique Incremental Compaction Strategy (ICS). Transcript Previous Quiz. Cheers! NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylladb/scylladb how much disk space is required to switch from SizeTiered to level compaction strategy in Scylla db? 4 How does Cassandra (or Scylla) sort clustering columns? 2 does Scylladb require as much memory as the data set? 3 Scylla token range select result ordering. g NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylladb/scylladb Size Tiered and Leveled Compaction Strategies STCS + LCS. E. hh at master · newsky/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. SSTables are periodically compacted to improve performance by merging and rewriting data and discarding the old one. The file can be found under /etc/scylla/. Using Nodetool to run compaction can quickly exhaust all resources, increase operational costs, and take up valuable disk space. Refer to Choose a Compaction Strategy for details. 15 min to completeThe lesson provides a deep dive into Leveled Compaction Strategy (LCS) It covers LCS – how it works, writes, examples, performance considerations for when to use it, space and write amplification, and common misconceptions. Next Topic 44 min to complete I'm trying to figure what compaction strategy should we use. In Apache Cassandra, the rate of the compaction is tuned by the user who needs to control its concurrency and throughput. hh at master · bhalevy/scylla So Garrett has 3 racks, lots of nodes and most nodes only 15% disk free and using Scylla 4. hh at master · devboxos/scylla Data Compaction¶ When records get updated or deleted, the old data eventually needs to be deleted. 9 min to completeThis lesson is about ScyllaDB Compaction Strategies. The lesson goes over a basic example of how to use it. The compaction strategy is a sub-property of the compaction configuration of each table so you will need to use the CQL ALTER TABLE command to choose a different compaction strategy other than the default. hh at master · arita37/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Merging several sorted files to get a sorted result is an efficient process, 6 min to completeThis lesson covers the Incremental Compaction Strategy (ICS). If snapshots (hard links) were created to existing SSTables on disk they are preserved even if table data is eventually stored in one or more of the new SSTables. hh at next · psarna/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · heroInCommunity/scylla Update Topology Strategy From Simple to Network¶. For a matrix which When writes occur on ScyllaDB, they first go into memory in what we call a memtable. With the leveled compaction strategy, sstable reads are efficient: First, it's important to note that the great number of small sstables doesn't mean we need to look up a This lesson is about Incremental Compaction Strategy – ICS It covers: what is ICS, SSTable Runs, how it works, performance, and when it should be used. Therefore, when using ScyllaDB with HDD storage, NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. The following procedure specifies how to update the replication strategy from SimpleStrategy to NetworkTopologyStrategy. In case you are using SimpleStrategy, there are two The new files are consolidated following compaction, which merges table’s data into one or more SSTable files (depending on the compaction strategy). Get a comparison of common compaction strategies and a technical ScyllaDB is an Apache Cassandra-compatible NoSQL data store that can handle 1 million transactions per second on a single server. Compaction Strategy¶ Determines which of the SSTables will be compacted, and when. . hh at master · syegres8/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. In almost all cases, the SizeTieredCompationStrategy (STCS) is the right choice and so it is the default. Procedure¶ Verify what the A reason to change the compaction strategy can be performance tradeoffs (disk space usage, read and write amplification). Note that SimpleStrategy is not recommended for production usage, and it is strongly advised to create new clusters with NetworkTopologyStrategy. Time-Window Compaction Strategy (TWCS) ScyllaDB System Requirements - verify your instances, system, OS, etc are supported by ScyllaDB for production machines. Anyhow Felippes idea is safe. hh at master · vjr/scylla. Your specific question on why two levels (L0 of recently flushed Generally with Size Tiered Compaction Strategy or Leveled Compaction Strategy, you want to keep about 50% of disk space free. in such case having Scylla Enterprise with ICS and Scylla Manager(SM) would mitigate the situation a bit. Change the compaction strategy means that the SSTables will be recompacted until the new compaction strategy is satisfied. In this post, we’ll explain why this new compaction strategy is needed, how it works, among other things. Resiliency¶ Compaction Strategies with Materialized Views¶ Materialized views, just like regular tables, use one of the available compaction strategies. In this option, each CPU also does the compaction of its own sstables. Because of that, I’ve added a default TTL value of 1 day so that the data that’s generated by a S301: ScyllaDB Operations Compaction Strategies Incremental Compaction Strategy (ICS) Deep Dive Compaction Summary Quiz ) , () ) Course Home Expand All. 3. Advise on stopping compaction to reduce slowness. For this reason, major compactions should be avoided and are not recommended for any production system. Back to Lesson Installation details #ScyllaDB version: 5. nodetool <options> stop--<compaction_type> Supported compaction types: COMPACTION, CLEANUP, SCRUB NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. ScyllaDB Deployment Best Practices: Racks and Setup. 4. hh at master · BigTong/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Onboarding 1 Topic Incremental Compaction Strategy (ICS) was created to take full advantage of this new compaction approach and it is exclusively available in newer ScyllaDB Enterprise releases (2019. Recommendation: write amplification can be further reduced by setting ScyllaDB option --compaction-enforce-min-threshold true, which guarantees the minimum threshold, 4 by default, is respected. conf configuration for HDD storage¶ As part of the Scylla setup process, iotune runs a short benchmark of your storage. A peek into the results: the time taken by replacing a 1 TB node, measured under Size-Tiered Compaction Strategy (STCS) and Leveled Compaction Strategy (LCS). hh at master · berkus/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · maniacs-db/scylla * 'twcs_v2' of github. For those unfamiliar, time-series is basically ICS combines the best of Leveled Compaction Strategy (LCS) and Size-tiered Compaction Strategy (STCS). Size Tiered Compaction Strategy (STCS) Deep Dive. Onboarding 1 Topic And it also depends on compaction strategy. Get a comparison of common compaction strategies and a technical deep dive into ICS. Recommendation: write amplification can be further reduced by setting Scylla option --compaction-enforce-min-threshold true, which guarantees the minimum threshold, 4 by default, is respected. Q8: Does scylla has tombstone compaction? If so, what the strategy or in other words when this occurs? NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Can we use 'NullCompactionStrategy' ? if yes what is the impact on Scylla/Cassandra cluster? ScyllaDB is an Apache Cassandra-compatible NoSQL data store that can handle 1 million transactions per second on a single server. hh at master · cloud-architecture/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. 19 #Cluster size: 22 #OS: ubuntu Hello everyone, My Scylla cluster version is 5. Here we’ll share with you the project we came up with, which involves implementing Binary Large Object (“blob”) support in NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. d/io. hh at master · qlw/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. 1 Changing compaction strategy - When the user changes compaction strategy, the existing sstables do not conform to the new compaction strategy’s invariants, and therefore the new compaction strategy may perform poorly. yaml file edit the endpoint_snitch. These fast writes come with a tradeoff in terms of read and space amplification. 0. This lesson is a deep dive into Size Tiered Compaction Strategy (STCS) It covers STCS – read amplification, space amplification, examples, and considerations for when to use. While compaction processes can help mitigate this, the RUM conjecture states that only two amplification factors can be Incremental Compaction Strategy (ICS) was created to take full advantage of this new compaction approach and it is exclusively available in newer Scylla Enterprise releases (2019. hh at master · jmininger/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · hellostorage/scylla depending on the compaction strategy, more than one compaction can run in parallel. Let’s go through a brief history of compaction strategies. It is always best to allow ScyllaDB to automatically run minor compactions using a compaction strategy. ) Scylla remembers in memory the minimum and maximum clustering key in each newly-flushed sstable o Efficiently find only the sstables with data relevant to a query Other compaction strategies o Destroy this feature by It is always best to allow Scylla to automatically run minor compactions using a compaction strategy. conf configuration file. hh at master · yanzeqing/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Back to Lesson. Incremental Compaction Strategy (ICS) was created to take full advantage of this new compaction approach and it is exclusively available in newer Scylla Enterprise releases (2019. 1. hh at master · mytry1/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. In the cassandra-rackdc. Use the following Compaction Strategy Matrix to use NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. 1 When opening a writer while using time window compaction strategy, create a special one that emits an sstable for every time window. Size Tiered Compaction Strategy (STCS) is the default Cassandra compaction strategy. By default (STCS) Scylla is almost 4x faster than Cassandra 4. hh at master · dingfc/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · fengzhuye/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Learn what happens in terms of storage when reading/writing data to ScyllaDB, what is Compaction and why it is necessary. hh at master · tomer-sandler/scylla Combine the best of Leveled Compaction Strategy and Size-tiered Compaction Strategy with Incremental Compaction Strategy – resulting in 35% better storage utilization Use encryption at rest, LDAP integration, and all of the other benefits of the previous closed source Enterprise version In this talk, we present the different compaction strategies that ScyllaDB provides, and demonstrate when it is appropriate and when it is inappropriate to use each one. A rule of thumb is about 50% free disk space. Why was date-tiered compaction strategy developed? In short words, the strategy was developed to improve performance for time-series use cases. This section is not relevant in 2. hh at master · krisnova/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. It’s very helpful in evaluating any solution and to assess cluster and data model performance. hh at master · cailianchun/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Learn about the different strategies available in ScyllaDB and our new Hybrid Compaction strategy coming soon in ScyllaDB Enterprise. com:raphaelsc/scylla: tests: add tests for time window compaction strategy compaction: wire up time window compaction strategy compaction/twcs: override default values with options in schema sstables: implement time window compaction strategy sstables: import TimeWindowCompactionStrategy. Importing sstables - In the general case importing sstables is similar to resharding and changing the compaction strategy. Setting io. hh at master · jianlirong/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. These strategies include: The following compaction strategies are supported by ScyllaDB: Size-tiered Compaction Strategy . It explains how it works, performance considerations, and compares it to other compaction strategies. It utilizes the advantages of the two strategies to benefit from the best of both worlds. hh at master · rahulpati118/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. hh at master · duarten/scylla NoSQL data store using the seastar framework, compatible with Apache Cassandra - scylla/compaction_strategy. Then, can I say that if I allocate more memory such as 8 GB, this Scylla/Cassandra: compaction strategy for time series data without TTL. I’m using ScyllaDB to store the data generated by running in parallel multiple scripts. It is triggered when the system has enough (four by default) similarly sized SSTables. @golang_learner: Does the delete operation trigger compaction or something that makes Scylla use a lot memory which causes NoHostAvailable error? I checked that there are 2GB left in the container in which Scylla is running on. In my tests, Scylla triggers a major compaction to apply the new But beyond the compaction strategy (which SSTables to compact and when), there is a more fundamental difference between the way Apache Cassandra and ScyllaDB perform the compaction itself. The following compaction strategies are available and are described in greater detail below. Change the endpoint_snitch to all the nodes in the cluster. Choose a Compaction Strategy¶ Each workload may require a specific strategy. 5 with STCS as compaction strategy Garret also uses nodetool repair -pr for repairs. Using Nodetool to run compaction can quickly exhaust all resources, increase operational costs, and take up 6 min to completeThis lesson takes a deep dive into ScyllaDB Compaction Strategies. jqu tjb fwycd gfba ama nzjfde jrbxesx tdozrq bcirjp qtwsk