At 2019/7/11 ??????5:50, Andreas Gr??nbacher Wrote: > At this point, can I ask how important this packing mechanism is to > you? I can see a point in implementing inline files, which help > because there tends to be a large number of very small files. But for > not-so-small files, is saving an extra block really worth the trouble, > especially given how cheap storage has become? I would try to answer the above. I think there are several advantages by using tail-end packing inline: 1) It is more cache-friendly. Considering a file "A" accessed by user now or recently, we ?????? tend to (1) get more data about "A" (2) leave more data about "A" according to LRU-like assumption ?????? because it is more likely to be used than the metadata of some other files "X", especially for files whose ?????? tail-end block is relatively small enough (less than a threshold, e.g. < 100B just for example); 2) for directories files, tail-end packing will boost up those traversal performance; 3) I think tail-end packing is a more generic inline, it saves I/Os for generic cases not just to ?????? save the storage space; "is saving an extra block really worth the trouble" I dont understand what exact the trouble is... Thanks, Gao Xiang
