rsync slowness
Gregory Heytings via rsync <[email protected]>
| Newsgroups | gmane.network.rsync.general |
|---|---|
| Message-ID | <[email protected]> |
I finally take the time to report an rsync slowness pattern that I've been seeing for years. Assuming: a directory with many (> 20K) files, for example a maildir, on the sending side, and a partial copy of that directory on the receiving side, with "enough" missing missing (say 5K), then the receiving side will do the following: it will take about one minute to start transferring the missing files, and will apparently hang about one minute every 200 files or so. After a few (about 10 or 20) iterations, the receiving side apparently hangs. On the receiving side rsync is using 100% CPU, on the sending side not more than a few percents. In case it matters, both sides are using ext4 filesystems, and Debian GNU/Linux. I tried --msgs2stderr -M--msgs2stderr, but that does not print any error message, I also tried to disable compression, to use --whole-file, to use --no-inc-recursive, ..., to no avail. Any hints? -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html