Hi Leonid, Am 13.08.2018 um 03:07 hat Leonid Bloch geschrieben: > This series makes the qcow2 L2 cache assignment aware of the image size, > with the intention for it to cover the entire image. The importance of > this change is in noticeable performance improvement, especially with > heavy random I/O. The memory overhead is not big in most cases, as only > 1 MB of cache for every 8 GB of image size is used. For cases with very > large images and/or small cluster sizes, or systems with limited RAM > resources, there is an upper limit on the default L2 cache: 32 MB. To > modify this limit one can use the already existing 'l2-cache-size' and > 'cache-size' options. Moreover, this fixes the behavior of 'l2-cache-size', > as it was documented as the *maximum* L2 cache size, but in practice > behaved as the absolute size. > > To compensate the memory overhead which may be increased following this > behavior, the default cache-clean-interval is set to 10 minutes by default > (was disabled by default before). > > The L2 cache is also resized accordingly, by default, if the image is > resized.
after digging through the most urgent part of my post-vacation backlog, I saw this series again. It's been a while, but I don't think much is missing, so let's get this finished now. :-) We had some discussion in the v7 thread after you posted v8, and you mentioned there that you'd do some changes in a v9 (at first sight, just some test case stuff). Are you still planning to send that v9? Kevin
