Hi,

I am doing some tests about spooling. I have created a spool filesystem for testing purposes. I decided to try a quiet small one - just 10 GB. Well, I get an ugly perfomance (<10MB/s) with this one. So I assume that the spool file system is too small - is this assumption right?

To get a bigger spool fs, there might be some options:
1) What is better: bigger spool fs or faster spool fs? So first option: 3,6 TB RAID0 with 12 SAS disks direct attatched vs second option: 2 or 3 120 GB SSDs? 
2) Does it make any sense to have a spool fs much bigger than the tape size? (LTO4 - 800MB, with compression up to 1,6 TB - so does it make sense to use a fs > 1,6 TB?) 
3) Specially with the SSDs - will I run in problems because of MTBF? Is anybody using SSDs for spool fs?

I have an autoloader with an SAS-LTO4 drive and I would like to get the drive to steam as fast as possible.

Thanks for you answers!
Regards, 
Frank

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Alexandre Chapellon

Ingénierie des systèmes open sources et réseaux.
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