SSD RAID1 vs RAID10

linuxthefish

What are you running first off? For all we know he might have a 10TB database and budget to match!

Umair

@jbiloh said:
Depends on your budget but we always recommend customers go for RAID 10 with LSI controllers. The 9271 is a beast.

Just curious, which SSDs you are using for such a setup?? Any specific brand/model? Or you go with what's available?

@vpslegend said:
What if both disks fail simultaneously in RAID 1? To be honest, you should always have a backup & disaster management strategy regardless of whatever RAID level you are using on your servers.

Never said RAID1/10 was anything to do with backups. You are right, one should always have backups. The discussion is about finding the right RAID setup and has nothing to do with backups.

@Clouvider said:
Microlinux I said up to 2 disks. Depending which disks will fail.

Also RAID10 rebuilds faster and the process affects the array less (in average workloads you won't notice the rebuilding process is taking place).

perennate. It's actually less. You have less load per drive, hence the average lifespan of the entire array is longer and failure of one drive has less effect on the array.

Do you have a rough idea of how fast a RAID10 will build compare to RAID1 if one SSD fails?? Lets assume All SSDs are enterprise class 500GB SSds and are 75% full.

Just a rough estimate will do.

Umair

@linuxthefish said:
What are you running first off? For all we know he might have a 10TB database and budget to match!

Seriously?? I did say the server will be running 10/15 VPS. And if there was 10TB of database, I would not have used a 500GB SSD as an example. :P

Clouvider

Rebuilding time similar, but 50% less impact. Depending on settings.

jbiloh

Umair said: Just curious, which SSDs you are using for such a setup?? Any specific brand/model? Or you go with what's available?

We recommend the LSI 9271 because of its very high performance. We use only Samsung or Intel SSDs.