The validation of snapshot names is turned off by default.
It is controlled by system property cassandra.snapshot.validation which is by default
set to false except 7.0 branch.
When the validation is turned on, the allowed characters are AWS safe characters together
with "+" character. A user can not specify any path separators in snapshot names even if
the validation as such is turned off.
patch by Stefan Miklosovic; reviewed by Francisco Guerrero, Matt Byrd for CASSANDRA-21389
patch by Andrés Beck-Ruiz, Runtian Liu; reviewed by Zhao Yang, Benedict Elliott Smith for CASSANDRA-21216
Co-authored-by: Runtian Liu <runtian@uber.com>
org.apache.cassandra.utils.MergeIterator.Candidate - has Comparator field which is the same for all Candidates under an MergeIterator instance, we can move the field to MergeIterator level. Candidate is 4.8% of all allocations and we can save 20% (~1% of all allocations) of it for JDK 21 with compressed references on.
switch from ArrayList to array in org.apache.cassandra.db.rows.Row.Merger
The ArrayList iterator costs 0.72% and BulkIterator.Adapter costs 0.35%. So, in total we can save here ~1% of total allocations.
patch by Dmitry Konstantinov; reviewed by Francisco Guerrero for CASSANDRA-21359
The following subcommands have been added:
* abortbootstrap Cancel and undo an inflight bootstrap
* abortmove Cancel and undo an inflight token move
* abortdecommission Cancel and undo an inflight decommission
* assassinate Remove a node from cluster metadata
* resetcms Redefine the CMS membership
* move Modify a node's (single) owned token
* describe Output a summary of the cluster metadata
* forcejoin Force a registered or joining node into a JOINED state
* print Output a full rendering of cluster metadata
* printdirectory Output a full rendering of the directory
* printdataplacements Output the full data placements
Patch by Venkata Harikrishna Nukala; reviewed by Alex Petrov and Sam Tunnicliffe
for CASSANDRA-19151
- TransactionStatement token aware routing
- Mitigate convoy effect:
- ExecuteTxnBacklog v1 can execute single key transaction backlogs and disseminate the result
- Direct local execution possible for single key transactions
- Use shardAppliedBefore instead of gcBefore to cleanup CFK faster
Also Improve:
- Introduce distributed tracing
- Combine RejectBefore and MaxConflicts
- Self-addressed messages are delivered directly
- Disable AccordSyncPropagator by default, as incompatible with large clusters
- FastPathStrategy.SIMPLE should not modify fast path contents; FastPathStrategy.UP introduced to adopt this behaviour
- Configurable queue prioritisation
- ProtocolModifiers mostly final
- Remove unnecessary condition check when serializing TxnUpdate
Also Fix:
- SequentialExecutor ownership bug
- BTree.XUpdater.reset()
patch by Benedict; reviewed by Alex Petrov and Ariel Weisberg for CASSANDRA-21361
use compression ratio to scale the amount of remaining disk usage
CompactionInfo::estimatedRemainingWriteBytes is uncompressed, causing compaction to be rejected due to size when it has space to complete
patch by Matt Byrd; reviewed by Dmitry Konstantinov, Marcus Eriksson for CASSANDRA-21245
Co-authored-by: Jon Meredith <jmeredithco@apple.com>
SinglePartitionReadCommand.Group#create - typical single partition select, use singletonList instead of ArrayList + Object[]
SelectStatement#getSliceCommands - remove unnessesary cloning of partition key, it is a part of a very old patch, now we copy all values from Netty buffers
SelectStatement#getSliceCommands - typical single partition select, use singletonList instead of ArrayList + Object[]
SinglePartitionReadQuery.Group#maybeValidateIndex, avoid iterators for restrictionSet if a full partition is selected
patch by Dmitry Konstantinov; reviewed by Francisco Guerrero, Stefan Miklosovic for CASSANDRA-21351
Stefan Miklosovic