Hi, I'm building a storage structure for OpenStack cloud System, input: - 700 VM - 150 IOPS per VM - 20 Storage per VM (boot volume) - Some VM run database (SQL or MySQL)
I want to ask a sizing plan for Ceph to satisfy the IOPS requirement, I list some factors considered: - Amount of OSD (SAS Disk) - Amount of Journal (SSD) - Amount of OSD Servers - Amount of MON Server - Network - Replica ( default is 3) I will divide to 3 pool with 3 Disk types: SSD, SAS 15k and SAS 10k Should I use all 3 disk types in one server or build dedicated servers for every pool? Example: 3 15k servers for Pool-1, 3 10k Servers for Pool-2. Could you help me a formula to calculate the minimum devices needed for above input. Thanks and regards.
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