-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 2010-11-15 at 14:00 -0800, Greg Freemyer wrote: ...
More realistically, you will need to create a raid 0 with 3 or 4 disks. The cost is not that high, and you should get good performance. (A 4-disk raid-0 should theoretically be 4x as fast as a single disk.)
Note that a 4 disk raid 0 is 4 times as unreliable as a single disk. So if reliability is a concern, now you need to create a 8-disk raid 10. At $100 per disk, that's less than $1K, so not a bad option.
That would also slow things down. Instead, after the process finishes, copy the data to a backup, or process it, or whatever. I think would instead write raw data to several disks, in burst of disk cache sizes, using my code, not a raid, so that if one disk is damaged I can reconstruct the rest with holes. Anyway, if one disk breaks during the process, the kernel would be stuck for some time till it puts that disk out of commission, so the data capture session would fail, anyway, so I don't think a raid 8 is an advantage here. If security is needed, use two computers in parallel.
No, 130 MB/sec is simply not achievable with a single disk.
Telcontar:~ # hdparm -tT /dev/sdc /dev/sdc: Timing cached reads: 12930 MB in 2.00 seconds = 6471.97 MB/sec Timing buffered disk reads: 370 MB in 3.01 seconds = 123.02 MB/sec Yes, the maximum I get is 126, I suppose better hardware can get more speed. - -- Cheers, Carlos E. R. (from 11.2 x86_64 "Emerald" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEARECAAYFAkzh1MMACgkQtTMYHG2NR9Vx+ACfZNdXto74yhPbQOciVxGOwuot 3CwAoIOvaAbja09qYnE6Q51auyWr90gm =Oo4v -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org