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PXC-4572 [DOCS] - PXC needs a local socket to work properly
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	modified:   docs/limitation.md
	modified:   docs/state-snapshot-transfer.md
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patrickbirch committed Dec 6, 2024
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12 changes: 11 additions & 1 deletion docs/limitation.md
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Expand Up @@ -73,6 +73,16 @@ The following limitations apply to Percona XtraDB Cluster:
!!! admonition "See also"
[Galera Documentation: Tables without Primary Keys](https://galeracluster.com/library/training/tutorials/differences.html#tables-without-primary-keys)
* When configuring Percona XtraDB Cluster, your server must create a local socket.
If you skip the socket creation with `socket=` in my.cnf, the server does not create the socket.
State Snapshot Transfer (SST) requires the socket for the following tasks:
* Taking backup using Percona XtraBackup
* Detecting keyring component status
* Avoid reusing the names of persistent tables for temporary tables
Expand Down Expand Up @@ -110,4 +120,4 @@ Do not use one or more dot characters (.) when defining the values for the follo
* [log_bin_index](https://dev.mysql.com/doc/refman/8.0/en/replication-options-binary-log.html#option_mysqld_log-bin-index)
MySQL and **XtraBackup** handles the value in different ways and this difference causes unpredictable behavior.
MySQL and Percona XtraBackup handle the character in different ways and this difference causes unpredictable behavior.
8 changes: 8 additions & 0 deletions docs/state-snapshot-transfer.md
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Expand Up @@ -15,6 +15,14 @@ The SST method can be configured using the [`wsrep_sst_method`](wsrep-system-ind
!!! note

If the [`gcs.sync_donor`](wsrep-provider-index.md#gcs.sync_donor) variable is set to `Yes` (default is `No`), the whole cluster will get blocked if the donor is blocked by SST.

## Limitation

When configuring Percona XtraDB Cluster, your server must create a local socket. If you skip the socket creation with `socket=` in my.cnf, the server does not create the socket. State Snapshot Transfer (SST) requires the local socket for the following tasks:

* Taking backup using Percona XtraBackup

* Detecting keyring component status

## Choose the SST Donor

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