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[Willian]

Hi all,
Anyone here works with the Pmta Spool set to a SSD disk?
Well, on disk performance, SSD is much faster than SATA/SAS disks, but would it interfere on Pmta performance?

Regards.

[CaLViN]

Well,
SSD is pretty much faster.
No need to worry.

[Port25-Admin1]

https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/newmds-ssdtuning.html

Red Hat also warns that software RAID levels 1, 4, 5, and 6 are not recommended for use on SSDs. During the initialization stage of these RAID levels, some RAID management utilities (such as mdadm) write to all of the blocks on the storage device to ensure that checksums operate properly. This will cause the performance of the SSD to degrade quickly.

[Willian]

Weel, but I have one with the spool set to a SATA disk.
I don't see a great difference between then, in fact, the only thing I've noticed were the disk queue.
SSD is a "Best Practice" or it doesn't matter at all?

[CaLViN]

Have you tried sending higher volumes or just 1-2k per minute ?

[Willian]

This is what I have today top.

                   in              out
top/minute   11,447   35,818

[CaLViN]

I think you will feel the difference after 25k/minute in-out.

[Willian]

Yes, I've tested it now. I can feel the difference, using performance monitors, but I don't think this had some impact on PMTA queue to send messages.
Do you use SSD drives? If not, what kind of disks do you use for spooling messages? (SAS, SATA...)

Thanks

[CaLViN]

Yes, I've tested it now. I can feel the difference, using performance monitors, but I don't think this had some impact on PMTA queue to send messages.
Do you use SSD drives? If not, what kind of disks do you use for spooling messages? (SAS, SATA...)

Thanks

We use both SSD and 15k RPM disks in Raid.
Both of them provide faster receiving and sending which means more volume per minute,hour,day.
I can also confirm that using fast disks gives you the ability to store much more emails in disks without any pmta crashes or slowness.

Just try storing 5 million emails in queue or sending 50k emails per minute on a 7k RPM disk ..

[Willian]

I also have it. RAID SSDs and RAID 15k RPM disks.
Well, I'll keep pushing. Let's see what we'll get.