When I used "rbd resize" option for size shrink, the image/volume lost its fs sectors and asking for "fs" not found... I have used "mkf" option, then all data lost in it? This happens with shrink option... Thanks Swami On Wed, May 11, 2016 at 5:28 PM, Christian Balzer <chibi@xxxxxxx> wrote: > > Hello, > > On Wed, 11 May 2016 13:33:44 +0200 (CEST) Alexandre DERUMIER wrote: > >> >>but the fstrim can used with in mount partition...But I wanted to as >> >>cloud admin... >> >> if you use qemu, you can launch fstrim through guest-agent >> > This of course assumes that qemu/kvm is using a disk method that allows > for TRIM. > > And nobody in their right mind uses IDE (performance), while virtio-scsi > isn't the default or even supported with some cloud stacks. > > And of course that the VM in question runs Linux and has fstrim installed. > > Otherwise solid advise, I agree. > > Christian >> >> http://dustymabe.com/2013/06/26/enabling-qemu-guest-agent-anddddd-fstrim-again/ >> >> ----- Mail original ----- >> De: "M Ranga Swami Reddy" <swamireddy@xxxxxxxxx> >> À: "Wido den Hollander" <wido@xxxxxxxx> >> Cc: "ceph-users" <ceph-users@xxxxxxxx> >> Envoyé: Mercredi 11 Mai 2016 13:16:27 >> Objet: Re: rbd resize option >> >> Thank you. >> >> but the fstrim can used with in mount partition...But I wanted to as >> cloud admin... >> I have a few uses with high volume size (ie capacity) allotted, but >> only used 5% of the capacity. so I wanted to reduce the size to 10% of >> size using the rbd resize command. But in this process, if a >> customer's volume has more than 10% data, then I may end-up with data >> lost... >> >> Thanks >> Swami >> >> On Wed, May 11, 2016 at 1:17 PM, Wido den Hollander <wido@xxxxxxxx> >> wrote: >> > >> >> Op 11 mei 2016 om 8:38 schreef M Ranga Swami Reddy >> >> <swamireddy@xxxxxxxxx>: >> >> >> >> >> >> Hello, >> >> I wanted to resize an image using 'rbd' resize option, but it should >> >> be have data loss. >> >> For ex: I have image with 100 GB size (thin provisioned). and this >> >> image has data of 10GB only. Here I wanted to resize this image to >> >> 11GB, so that 10GB data is safe and its resized. >> >> >> >> Can I do the above resize safely.? >> >> >> > >> > No, you can't. You need to resize the filesystem and partitions inside >> > the RBD image to something below 11GB before you can do this. >> > >> > Still, make sure you have backups! >> > >> > Also, why shrink? If you can, run a fstrim on the image, that might >> > reclaimed unused space on the Ceph cluster. >> > >> >> If I tried to resize to 5GB, is rbd throughs an error saying that >> >> your data is going loss, something like that??? >> >> >> >> Any inputs here are appriciated. >> >> >> >> Thanks >> >> Swami >> >> _______________________________________________ >> >> ceph-users mailing list >> >> ceph-users@xxxxxxxxxxxxxx >> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > -- > Christian Balzer Network/Systems Engineer > chibi@xxxxxxx Global OnLine Japan/Rakuten Communications > http://www.gol.com/ > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |