>>> On Mon, 22 May 2023 13:08:19 +0530, Nick dan via lustre-discuss >>> <[email protected]> said:
> Hi I had one doubt. In lustre, data is divided into stripes > and stored in multiple OSTs. So each OST will have some part > of data. My question is if one OST fails, will there be data > loss? This is extensively discussed in the Lustre manual with comprehensive illustrations: https://doc.lustre.org/lustre_manual.xhtml#understandinglustre.storageio https://doc.lustre.org/lustre_manual.xhtml#pfl https://doc.lustre.org/lustre_manual.xhtml#understandingfailover The usual practice is to use RAUD10 for the MDT(s) on "enterprise" high-endurance SSD, and RAID6 for the OST on "professional" mixed-load SSDs or "small" (1-2TB at most) "datacenter" HDDs, fronted by failover-servers. I personally think that is is best to rely on Lustre striping and the "new" PFL LFR layout (across two OST "pools"), and have each OST on a single device, and and very few OSTs per OSS, when Lustre is used as "scratch" area for an HPC cluster. https://doc.lustre.org/lustre_manual.xhtml#flr _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
