+ <para condition="l24">With a ZFS backing filesystem for the MDT or OST,
+ the space allocation for inodes and file data is dynamic, and inodes are
+ allocated as needed. A minimum of 2kB of usable space (before RAID) is
+ needed for each inode, exclusive of other overhead such as directories,
+ internal log files, extended attributes, ACLs, etc.
+ Since the size of extended attributes and ACLs is highly dependent on
+ kernel versions and site-specific policies, it is best to over-estimate
+ the amount of space needed for the desired number of inodes, and any
+ excess space will be utilized to store more inodes.</para>
+ <section>
+ <title><indexterm>
+ <primary>setup</primary>
+ <secondary>MGT</secondary>
+ </indexterm>
+ <indexterm>
+ <primary>space</primary>
+ <secondary>determining MGT requirements</secondary>
+ </indexterm> Determining MGT Space Requirements</title>
+ <para>Less than 100 MB of space is required for the MGT. The size is determined by the number
+ of servers in the Lustre file system cluster(s) that are managed by the MGS.</para>
+ </section>