So, is there any resolution to this?
If I'm reading this correctly, it sounds like this tweak wont do anything for user shares.
Tom,
Sorry to say, it makes a big difference when reading the same file through a "user share"
Looks like we drop down to about half of the performance of reading directly from /mnt/diskX
Are user-shares buffered? Perhaps they could use some tweaking too? They are way less efficient than reading directly from the /mnt/diskX directory.
23 to 28 MB/s vs. 47 MB/s.
Joe L.
root@Tower:/boot# blockdev --setra 256 /dev/md8
root@Tower:/boot# dd if=/mnt/user/Movies/WIMBLEDON.ISO of=/dev/null
10127896+0 records in
10127896+0 records out
5185482752 bytes (5.2 GB) copied, 181.625 seconds, 28.6 MB/s
root@Tower:/boot# blockdev --setra 2048 /dev/md8
root@Tower:/boot# dd if=/mnt/user/Movies/WIMBLEDON.ISO of=/dev/null
10127896+0 records in
10127896+0 records out
5185482752 bytes (5.2 GB) copied, 220.202 seconds, 23.5 MB/s
root@Tower:/boot# dd if=/mnt/disk8/Movies/WIMBLEDON.ISO of=/dev/null
10127896+0 records in
10127896+0 records out
5185482752 bytes (5.2 GB) copied, 110.238 seconds, 47.0 MB/s
