From: Sage Weil Date: Tue, 12 Apr 2016 12:49:55 +0000 (-0400) Subject: doc: do not include ext4 as an example X-Git-Tag: ses3-milestone4~27^2~4 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=bcfce592a21a2f135bb8ae312dc94c903d1de6f5;p=ceph.git doc: do not include ext4 as an example Signed-off-by: Sage Weil --- diff --git a/doc/start/ceph.conf b/doc/start/ceph.conf index 513ed4501a9..e2057caddd7 100644 --- a/doc/start/ceph.conf +++ b/doc/start/ceph.conf @@ -17,9 +17,9 @@ #osd mkfs options {fs-type} = {mkfs options} # default for xfs is "-f" #osd mount options {fs-type} = {mount options} # default mount option is "rw,noatime" - # For example, for ext4, the mount option might look like this: + # For example, for xfs, the mount option might look like this: - #osd mkfs options ext4 = user_xattr,rw,noatime + #osd mkfs options xfs = inode64,rw,noatime # Execute $ hostname to retrieve the name of your host, # and replace {hostname} with the name of your host. diff --git a/doc/start/hardware-recommendations.rst b/doc/start/hardware-recommendations.rst index da91af75fad..777202092de 100644 --- a/doc/start/hardware-recommendations.rst +++ b/doc/start/hardware-recommendations.rst @@ -55,10 +55,10 @@ OS operations, and simultaneous request for read and write operations from multiple daemons against a single drive can slow performance considerably. There are also file system limitations to consider: btrfs is not quite stable enough for production, but it has the ability to journal and write data simultaneously, -whereas XFS and ext4 do not. +whereas XFS does not. .. important:: Since Ceph has to write all data to the journal before it can - send an ACK (for XFS and EXT4 at least), having the journal and OSD + send an ACK (for XFS at least), having the journal and OSD performance in balance is really important! @@ -100,7 +100,7 @@ lead to resource contention and diminish the overall throughput. You may store a journal and object data on the same drive, but this may increase the time it takes to journal a write and ACK to the client. Ceph must write to the journal before it can ACK the write. The btrfs filesystem can write journal data and -object data simultaneously, whereas XFS and ext4 cannot. +object data simultaneously, whereas XFS cannot. Ceph best practices dictate that you should run operating systems, OSD data and OSD journals on separate drives.