Hello, In addition to my last message, you could test performance using the Allocation Group size = 4GB, your users' email quota. As XFS deals with AG as something like filesystems inside the filesystem, the account activity will be contained at that AG, during parallel iops. As each AG implies a given amount of housekeeping and cpu, it should be a convenient point trade off. Again, test it at your hw/storage/network setup. Regards. Andre Felipe Machado [0] http://www.techforce.com.br/news/linux_blog/lvm_raid_xfs_ext3_tuning_for_small_files_parallel_i_o_on_debian
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