Percona is glad to announce the release of Percona XtraDB Cluster on September 18th, 2013. Binaries are available from downloads area or from our software repositories.
This is an General Availability release. We did our best to eliminate bugs and problems during the testing release, but this is a software, so bugs are expected. If you encounter them, please report them to our bug tracking system.
Default State Snapshot Transfer method, defined in
wsrep_sst_method
has been changed frommysqldump
torsync
.New
wsrep_reject_queries
has been implemented that can be used to reject queries for that node. This can be useful if someone wants to manually run maintenance on the node likemysqldump
without need to change the settings on the load balancer.Variable
wsrep_sst_donor
has been extended to accept multiple hostnames that are preferred as State Snapshot Transfer donors. This can be helpful in case other nodes on the list go down or it can be used as a whitelist during automated provisioning.Desync functionality has now been exposed to the client. This can be done either via
/*! WSREP_DESYNC */
comment on the query or by setting the globalwsrep_desync
variable to1
.
Note
There are several changes to Xtrabackup SST from 5.5.33 onwards. Make sure to check XtraBackup SST for details, and also incompatibilities for any issues.
Percona XtraDB Cluster has implemented progress indicator for XtraBackup SST.
Percona XtraDB Cluster has implemented new rate limiting, rlimit
, option for XtraBackup SST that can be used to avoid saturating the donor node.
Percona XtraDB Cluster has added new XtraBackup SST time
option that can be used to see how much time different stages of State Snapshot Transfer are taking.
Percona XtraDB Cluster has implemented additional XtraBackup SST encryption option. Beside standard Percona XtraBackup encryption, new OpenSSL
based encryption can be specified in the encrypt
option.
XtraBackup SST now works in two stages. This was implemented to avoid issues like bug bug:1193240.
When multiple slave threads were configured, if there was a query on different transaction that inserts a row, and a query on another transaction within the same thread id that depends on the first row (FK constraint), sometimes the second transaction would be executed first causing the Foreign Key violation. Bug fixed #1217653.
When variable
wsrep_provider
was set to none it would cause cluster to hang. Bug fixed #1208493.Percona XtraDB Cluster would crash with message:
Error "no such a transition EXECUTING -> COMMITTED"
on the master node. This bug was fixed only for some cases. Bug fixed #1123233.Running DDL commands while variable
wsrep_OSU_method
was set toTOI - Total Order Isolation
could lead to server deadlock. Bug fixed #1212955.Stopping mysql process with
inet
script didn’t work ifPID
file was provided aspid_file
option in themy.cnf
configuration file. Bug fixed #1208865.When
read-only
variable was set toON
, Percona XtraDB Cluster would blockSELECT
statements as well. Bug fixed #1091099.In geo-DR setup using
garbd
, performance would degrade with node count when cross data center link was down. Bug fixed #1182960.
wsrep_recover
was being run even if it wasn’t used. Script now checks ifgrastate.dat
file has non-zerouuid
and -1seqno
before it decides to start withwsrep_recover
option. Bug fixed #1193781.
PID
detection in theinit
script wasn’t working correctly if thePID
file was specified with the relative path. Bug fixed #1194998.State Snapshot Transfer authentication password was displayed in the
ps
output. Bug fixed #1200727.Fixed the packaging issue caused by shared-compat linking. Bug fixed #1201393.
Fixed the platform dependent code in wsrep which was required to make the code portable to
MacOS X
andFreeBSD
. Bug fixed #1201893.Percona XtraDB Cluster donor node would get stuck during the State Snapshot Transfer when the threadpool plugin was used. Bug fixed #1206565.
pyclustercheck
script did not work correctly with HAProxy. Bug fixed #1210239.
pyclustercheck
script didn’t work as expected when available node was a donor. Bug fixed #1211249.New bootstrap method
bootstrap-pxc
which was introduced in5.5.31-23.7.5
didn’t check if mysqld process was already running before starting the new process. Bug fixed #1211505.When table was created with
LIKE
and the source table was temporary table, create statement would be replicated to the slave nodes where it couldn’t be applied because the temporary table wasn’t present on the slave nodes. This would cause other nodes to crash if there were laterDML
commands for this table. Bug fixed #1212247.Non-unique indexes in a parent table (as referenced by some foreign key constraint), would be included in write set population. i.e. key values in all non-unique indexes will be appended in the write set’s key set. This could cause excessive multi-master conflicts, especially if the parent table has non-unique indexes with low selectivity. Bug fixed #1216805.
Added information to InnoDB status if the transaction is waiting on
TOI
. Bug fixed #1219856.Binary build was linked against
libssl.so.10
andlibcrypto.so.10
which was making it hard to run onSUSE Linux Enterprise Server 11
. Bug fixed #1213855.
GU_AVPHYS_SIZE
would report more available memory than could be addressed on 32-bit systems. Bug fixed #1204241.
Other bug fixes: bug fixed #1210638, bug fixed #1222777, bug fixed #1216904, bug fixed #1205467, bug fixed #1196898, bug fixed #1195355, bug fixed #1049599, bug fixed #1191395, bug fixed #1017526, bug fixed #1213073, bug fixed #1171759, bug fixed #1210618, bug fixed #1190756.
For Debian/Ubuntu users: Percona XtraDB Cluster 5.5.33-23.7.6 includes a new dependency, the socat
package. If the socat
is not previously installed, percona-xtradb-cluster-server-5.5
may be held back. In order to upgrade, you need to either install socat
before running the apt-get upgrade
or by writing the following command: apt-get install percona-xtradb-cluster-server-5.5
. For Ubuntu users the socat
package is in the universe repository, so the repository will have to be enabled in order to install the package.
Based on Percona Server 5.5.33-31.1 including all the bug fixes in it, Galera Replicator and on Codership wsrep API 5.5.33-23.7.6, Percona XtraDB Cluster 5.5.33-23.7.6 is now the current stable release. All of Percona‘s software is open-source and free.
Percona XtraDB Cluster Errata can be found in our documentation.
For general inquiries, please send us your question and someone will contact you.