Xenserver 7 and local SRs
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So it appears that XS 7 now supports ext4. Is there a consensus on the recommended format for local SRs?
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It's about time. XFS would be better than EXT4, though.
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@scottalanmiller Why? Not challenging, asking. What makes it superior? All I ever see listed is "more robust" and they don't specify anything. Is it in relation to larger file sizes?
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@wirestyle22 said
@scottalanmiller Why? Not challenging, asking. What makes it superior? All I ever see listed is "more robust" and they don't specify anything. Is it in relation to larger file sizes?
It's more robust.
Seriously, I have no idea. I am sure @scottalanmiller will answer.
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@wirestyle22 Ext4 is really quite limiting on file size and severely limits the total size of the file system (16TB if I remember correctly).
Having actually used both file systems extensively, XFS is my go to choice.
brtfs will be my choice once it's feature complete and stable. The file system part is ready to go, but I personally haven't heard anything on use of the advanced features yet.
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@travisdh1 said in Xenserver 7 and local SRs:
@wirestyle22 Ext4 is really quite limiting on file size and severely limits the total size of the file system (16TB if I remember correctly).
Having actually used both file systems extensively, XFS is my go to choice.
brtfs will be my choice once it's feature complete and stable. The file system part is ready to go, but I personally haven't heard anything on use of the advanced features yet.
Yeah that is what I figured. Appreciate the info
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XFS is the modern standard. RHEL / CentOS decided that XFS was the way forward with RHEL 7. It is more mature, is more reliable and performance better while allowing for larger file sizes. That last piece is pretty big when dealing with VMs as an individual VM is represented by a single file. So those limits can be crippling.
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XS 7 doesn't have XFS natively from just looking at mkfs. I'm not sure what this indicates with regards to XS SR support. All of the documentation I looked at, including the version 1.0 of the 7 Admin Guide, only mention ext3 and LVM. I assumed that since ext4 is now an option within mkfs. that it might be supported in xr sr-create.
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Well that just sucks. Was very hopeful that we were going to see XFS made available on XS 7. Why the heck is it not the standard, let alone available, yet?!?!
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@scottalanmiller said in Xenserver 7 and local SRs:
XFS is the modern standard. RHEL / CentOS decided that XFS was the way forward with RHEL 7. It is more mature, is more reliable and performance better while allowing for larger file sizes. That last piece is pretty big when dealing with VMs as an individual VM is represented by a single file. So those limits can be crippling.
Good information. Thanks!
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@scottalanmiller In 6.5 it seems to be available in dom0 at least.
mount -t tmpfs -o size=128M xfs /mnt/ramdisk/Getting a double entry for some reason, but it just works.
[root@xen1 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sdc1 4.0G 2.2G 1.7G 57% / none 932M 156K 931M 1% /dev/shm /opt/xensource/packages/iso/XenCenter.iso 56M 56M 0 100% /var/xen/xc-install xfs 128M 0 128M 0% /mnt/ramdisk xfs 128M 0 128M 0% /mnt/ramdisk -
Easy enough to add to XS7 I assume, but sucks that it isn't the default.
