# Wan traffic?

**URL:** <https://forums.percona.com/t/wan-traffic/2846>\
**Category:** Percona XtraDB Cluster 5.x\
**Created:** [July 26, 2013, 11:49pm UTC](https://forums.percona.com/t/wan-traffic/2846 "2013-07-26T23:49:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gfxrelay](https://avatars.discourse-cdn.com/v4/letter/g/54ee81/32.png) [@gfxrelay](https://forums.percona.com/u/gfxrelay)\
**Post date:** [July 26, 2013, 11:49pm UTC](https://forums.percona.com/t/wan-traffic/2846/1 "2013-07-26T23:49:17Z")

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Hi, firstly thanks to everyone for a truely awesome program. I was just wondering if anyone would reccomend rsync\_wan or xtrabackup as sst method for wan replication. Our sites are separated T1 lines, but it is crusial, that all data be kept up to date.

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**Author:** ![przemek](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/przemek/32/3_2.png) [@przemek](https://forums.percona.com/u/przemek)\
**Post date:** [July 29, 2013, 4:35am UTC](https://forums.percona.com/t/wan-traffic/2846/2 "2013-07-29T04:35:30Z")

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xtrabackup is always recommended - it’s not blocking for the most part of transfer unlike the rsync. Moreover, with [xbstream](http://www.percona.com/doc/percona-xtrabackup/2.1/xbstream/xbstream.html) option, [compact](http://www.percona.com/doc/percona-xtrabackup/2.1/xbstream/xbstream.html) and [compressed](http://www.percona.com/doc/percona-xtrabackup/2.1/innobackupex/streaming_backups_innobackupex.html#examples-using-xbstream) methods are available, which can matter specially on WAN links. More info here: [http://www.percona.com/doc/percona-x](http://www.percona.com/doc/percona-x)…\_transfer.html  
However note that SST is needed only on node joining or sync after some failures, and not used for keeping the node up to date during normal operation, where wsrep replication handles this.