I like to have best io performance as well as good capaciyy and reliability out of a server that hosts a busy forum, which involves loads of static files download. I am wondering what is the best plan to format and use the disks given that the server has only 4 disk bays and I have 2 SSD and 2 SATA disks at hand. I am currently thinking about putting the disks in RAID 10 so that SSD contains /var/lib/mysql as well as most of the OS (Likely to be Debian) and SATA disk to contain /path/to/static/files. However I'd like to hear your expert opinion on this. Thanks
closed as not constructive by Zoredache, Tim Brigham, Ward, Michael Hampton♦, HopelessN00b Oct 8 '12 at 0:30
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Put the SATA disks in a RAID 1. Put the SSDs in a RAID 1. There's no other viable option in a standard server with 4 bays where 2 disks are SSD and 2 are not.
No. No. No. No. No. No. No.
If you got the SSD's for the speed only, and with no important data on them, you could put them in RAID0. Then you could use your SATA disks in RAID1 as backup if the SSD's fails.
This will give you some nice speeds, and still have your data secured on the RAID1.
Best I/O performance?
Not at all recommended. RAID0 isn't RAID at all
Best I/O safety?
Realistically, the best and easiest to manage option. Someone of your ability should do this.
Best I/O performance and safety?
More tricky to configure, but could reap benefits of the HOT SSD storage
OR if you are feeling more creative/brave
You'd have to be mad to do this