On 2012-11-18 12:13, Jim Klimov wrote:
On another side note: Perhaps it might be a useful tunable precaution - to have ZFS access the individual disks in a TLVDEV with some delay between each other, adding to latency and to safety against such problem-cause, but the illumos-gate might reasonably turn the idea down, because a well-built machine of the target market shouldn't suffer this problem - and the added code complexity and artificially slower IOs would likely be seen as a drawback. Also, command-queuing in the firmware might render these precautions worthless. Then again, developer enthusiasts are free to try implementing this failsafe net IO mode for the worse boxes out there, and I won't mind having it enabled on my box at least for added peace of mind. The box is slow enough already with random IOs (5-10MB/s was not uncommon), so I won't be bothered by even more lags, as long as it keeps the data safely. I think, I'll post an RFE lest the idea be lost.
Just in case someone picks this idea up, it is more cleanly formulated as a new RFE: https://www.illumos.org/issues/3372 //Jim _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
