# updating galera2 to galera3 in percona-xtradb-5.6 cluster

**URL:** <https://forums.percona.com/t/updating-galera2-to-galera3-in-percona-xtradb-5-6-cluster/4370>\
**Category:** Percona XtraDB Cluster 5.x\
**Created:** [August 27, 2015, 4:50am UTC](https://forums.percona.com/t/updating-galera2-to-galera3-in-percona-xtradb-5-6-cluster/4370 "2015-08-27T04:50:02Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![giomanda](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@giomanda](https://forums.percona.com/u/giomanda)\
**Post date:** [August 27, 2015, 4:50am UTC](https://forums.percona.com/t/updating-galera2-to-galera3-in-percona-xtradb-5-6-cluster/4370/1 "2015-08-27T04:50:02Z")

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Hi

I have a percona cluster of three nodes running innodb 5.6 with galera 2.12. I wish to do a rolling upgrade from galera2 to galera3 .  
I saw the article regarding the upgrade process which states that i should set wsrep\_provider\_options=”socket.checksum=1″ in order to have compatibilities with the different galera versions.

However, doing so, when i restart the server i get the following error and the server wont start.

“Unrecognized parameter ‘socket.checksum’”

Any ideas?

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<div class="post-metadata">

**Author:** ![giomanda](https://avatars.discourse-cdn.com/v4/letter/g/7ea924/32.png) [@giomanda](https://forums.percona.com/u/giomanda)\
**Post date:** [August 27, 2015, 5:03am UTC](https://forums.percona.com/t/updating-galera2-to-galera3-in-percona-xtradb-5-6-cluster/4370/2 "2015-08-27T05:03:25Z")

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oops, just figured out, this setting mus be enabled on the galera3 node.