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we in Flussonic work with disks a lot: record video and stream video files from disks.
During a long time we had +A 100 default setting to allow making a lot of simultaneous requests to disk.
This setting is ok if one wants to stream about 10 Gbit/s from local HDDs and SSDs to network and ok for 20 HDD.
But on small amount of disks (1-2) this is bad, because regular sysadmin is frightened when he see LA 80.
There is no way to dynamically change +A pool size from erlang code, so it must be done from launching shell script.
I think that it may be a good idea to find list of block devices and take 5*Count. Is it ok?
What experience do other people have here?
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