Hi, We used a PXE boot with NFS server, but had some issues if NFS server crapped out and dropped connections or needed a reboot for maintenance. If I remember it correctly it sometimes took out some of the rebooted servers. So we switched to PXE with livecd based images. You basically create a livecd image, then boot it with specially prepared initramfs image and it uses a copy on write disk for basic storage. With mimic osd's are started automatically, just need to feed some basic settings for that server. On Fri, Aug 17, 2018 at 11:31 AM Florian Florensa <florian@xxxxxxxxxxx> wrote: > > What about PXE booting the OSD's server ? I am considering doing these > sort of things as it doesn't seem that complicated. > A simple script could easily bring the osd back onine using some lvm > commands to bring the lvm back online and then some ceph-lvm activate > command to fire the osd's back up. > > > 2018-08-15 16:09 GMT+02:00 Götz Reinicke <goetz.reinicke@xxxxxxxxxxxxxxx>: > > Hi, > > > >> Am 15.08.2018 um 15:11 schrieb Steven Vacaroaia <stef97@xxxxxxxxx>: > >> > >> Thank you all > >> > >> Since all concerns were about reliability I am assuming performance impact of having OS running on SD card is minimal / negligible > > > > some time ago we had a some Cisco Blades booting VMware esxi from SD cards and hat no issue for month …till after an update the blade was rebooted and the SD failed …and then an other on an other server … From my POV at that time the „server" SDs where not close as reliable as SSDs or rotating disks. My experiences from some years ago. > > > >> > >> In other words, an OSD server is not writing/reading from Linux OS partitions too much ( especially with logs at minimum ) > >> so its performance is not dependent on what type of disk OS resides on > > > > Regarding performance: What kind of SDs are supported? You can get some "SDXCTM | UHS-II | U3 | Class 10 | V90“ which can handle up to 260 MBytes/sec; like „Angelbird Matchpack EVA1“ ok they are Panasonic 4K Camera certified (and we use them currently to record 4K video) > > > > https://www.angelbird.com/prod/match-pack-for-panasonic-eva1-1836/ > > > > My2cents . Götz > > > > > > > > _______________________________________________ > > 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
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