[Gluster-users] Geo-Replication what is transferred

Aravinda Vishwanathapura Krishna Murthy avishwan at redhat.com
Wed Sep 4 03:02:59 UTC 2019

Hi Petric,

On Wed, Sep 4, 2019 at 2:23 AM Petric Frank <pfrank at gmx.de> wrote:

> Hello,
> given a geo-replicated file of 20 GBytes in size.
> If one byte in this file is changed, what will be transferred ?
> - the changed byte
> - the block/sector the containing the changed byte
> - the complete file

Gluster Geo-replication uses Changelog for detecting the new or modified
files list after the last sync. Once the list of files is available, then
it passes that list of Rsync jobs. Which internally calculates the delta
changes and sync only those delta changes.

Note: Geo-replication syncs complete file if the use-tarssh option is set
to true.

> Is the storage mode relevant - sharded/striped/... ?

If the Master volume is sharded, then Remote/Slave volume also should be
sharded Volume. Geo-rep is intelligent to detect the changes to the sharded
files and sync only those files.

> regards
>   Petric
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> https://lists.gluster.org/mailman/listinfo/gluster-users

Aravinda VK
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