A few things-
On 4/5/2018 9:23 PM, Elliott Balsley wrote:
I have 8 SSDs in RAID5 on a LSI 9361 SAS controller, formatted as NTFS.
I got the 3000 number from AJA System Test. That test was writing a
single file, so probably performance would drop when writing lots of
small files. I will benchmark again with small files.
Writing to RAID5 is really only as fast as a single drive since for every
block written, it has to write that data, read the entire stripe,
calculate/write the new parity. (And RAID5 is generally considered to be
slow...)
I wouldn't trust Aja's number; download a copy of 'fio' and use that (or one
of the several windows-based disk benchmarks). Since you're doing lots of
"small" files, the file system overhead will be really eat into the throughput.
This machine has 28 real CPU cores, so I’m wondering if ffmpeg or lavfi
is limited to one core?
Use SysInternals "process explorer" to watch the individual cores while
coding; it's much better than the windoze task manager.
All of these are readily find-able via google :).
Do you _really_ need a bunch of identical TIFF files? If they're all the
same, make one file and use a script to copy/rename it a bunch of times.
(And TIFFs are huge compared to other still image formats anyway.)
Later,
z!
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