diff --git a/docs/Administrator-Guide/arbiter-volumes-and-quorum.md b/docs/Administrator-Guide/arbiter-volumes-and-quorum.md index 1bc3fc4..f1475a9 100644 --- a/docs/Administrator-Guide/arbiter-volumes-and-quorum.md +++ b/docs/Administrator-Guide/arbiter-volumes-and-quorum.md @@ -22,7 +22,7 @@ replica 3 volume without consuming 3x space. The syntax for creating the volume is: ``` -# gluster volume create replica 2 arbiter 1 ... +# gluster volume create replica 2 arbiter 1 ... ``` **Note**: The earlier syntax used to be ```replica 3 arbiter 1``` but that was leading to confusions among users about the total no. of data bricks. For the @@ -33,7 +33,7 @@ arbiter volume. For example: ``` -# gluster volume create testvol replica 2 arbiter 1 server{1..6}:/bricks/brick +# gluster volume create testvol replica 2 arbiter 1 server{1..6}:/bricks/brick volume create: testvol: success: please start the volume to access data ``` @@ -66,9 +66,9 @@ performance.readdir-ahead: on ` ``` The arbiter brick will store only the file/directory names (i.e. the tree structure) -and extended attributes (metadata) but not any data. i.e. the file size +and extended attributes (metadata) but not any data, i.e. the file size (as shown by `ls -l`) will be zero bytes. It will also store other gluster -metadata like the .glusterfs folder and its contents. +metadata like the `.glusterfs` folder and its contents. _**Note:** Enabling the arbiter feature **automatically** configures_ _client-quorum to 'auto'. This setting is **not** to be changed._ @@ -76,11 +76,10 @@ _client-quorum to 'auto'. This setting is **not** to be changed._ ## Arbiter brick(s) sizing Since the arbiter brick does not store file data, its disk usage will be considerably -less than the other bricks of the replica. The sizing of the brick will depend on +less than for the other bricks of the replica. The sizing of the brick will depend on how many files you plan to store in the volume. A good estimate will be 4KB times the number of files in the replica. Note that the estimate also -depends on the inode space alloted by the underlying filesystem for a given -disk size. +depends on the inode space allocated by the underlying filesystem for a given disk size. The `maxpct` value in XFS for volumes of size 1TB to 50TB is only 5%. If you want to store say 300 million files, 4KB x 300M gives us 1.2TB.