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| From: | Rich Freeman <rich0@g.o> | ||
|---|---|---|---|
| To: | gentoo-user@l.g.o | ||
| Subject: | Re: [gentoo-user] LVM and moving things around | ||
| Date: | Tue, 05 Apr 2022 18:59:08 | ||
| Message-Id: | CAGfcS_mb+Lk5D02LarqBAYX--VmtQQLYq7+tq_4Eo=-y+X8Ucg@mail.gmail.com | ||
| In Reply to: | Re: [gentoo-user] LVM and moving things around by Wols Lists |
||
| 1 | On Tue, Apr 5, 2022 at 11:10 AM Wols Lists <antlists@××××××××××××.uk> wrote: |
| 2 | > |
| 3 | > I don't know how you take advantage of it, but linux by default caches |
| 4 | > disk i/o. You can tell it to "don't cache" and apparently it makes a |
| 5 | > major difference. Given that rsync reads once and then never uses it |
| 6 | > again, you don't want it cached. |
| 7 | > |
| 8 | |
| 9 | I suggest reading: |
| 10 | man posix_fadvise |
| 11 | https://insights.oetiker.ch/linux/fadvise/ |
| 12 | http://rdiez.shoutwiki.com/wiki/The_Linux_Filesystem_Cache_is_Braindead |
| 13 | https://lwn.net/Articles/806980/ |
| 14 | https://bugzilla.samba.org/show_bug.cgi?id=9560 |
| 15 | |
| 16 | There might be something more recent, but my overall impression is |
| 17 | that this problem is less solved than it probably ought to be. |
| 18 | |
| 19 | -- |
| 20 | Rich |
| Subject | Author |
|---|---|
| RE: [gentoo-user] LVM and moving things around | Laurence Perkins <lperkins@×××××××.net> |