[Gluster-devel] Testing SEEK_HOLE performance

[Christopher Pereira]

On 10-05-2015 7:30, Niels de Vos wrote:

> [...]
> This shows two read calls over the network:
> 1. offset: 0;      size: 131072
> 2. offset: 131072; size: 131072
>
> There are no lseek() requests for SEEK_HOLE/SEEK_DATA sent over the
> network. Looking into the operations (FOPs) that are available to the
> Gluster xlators, it seems that there is no lseek() FOP. For normal
> lseek() requests, the position of the file-descriptor is kept
> client-side, so there is no need for the server to support it. However,
> for SEEK_HOLE/SEEK_DATA, the server needs to do some actions.
>
> For all I can see there is currently no support for SEEK_HOLE/SEEK_DATA
> in Gluster, but it seems not too difficult to add.
Thanks for confirming.
> Please file a feature
> request in Bugzilla:
>
>      https://bugzilla.redhat.com/enter_bug.cgi?product=GlusterFS&component=core&keywords=FutureFeature
BZ:
https://bugzilla.redhat.com/show_bug.cgi?id=1220173
> Do you have an interest do implement this, or could it be a project that
> we can give to new contributors that would like to develop something for
> Gluster?

Right now, I'm more interested in improving oVirt's gluster support.
I will start another thread...