<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">zstd support was added in v2.3.11 (not v2.3.12 like I mistakenly tried to say in the earlier mail).<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 28. Aug 2020, at 16.36, Robert Nowotny <<a href="mailto:rnowotny@rotek.at" class="">rnowotny@rotek.at</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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ok, I did install zstd (zstd command line interface 64-bits v1.4.4,
by Yann Collet)<br class="">
<br class="">
reconfigured & compiled dovecot <font class="" face="Courier
New"><font class="" face="Courier New"><font class="" face="Courier New"><font class="" face="Courier New">2.3.10.1
</font></font></font></font>again with option : with-zstd<br class="">
<br class="">
changed the configuration file to : <br class="">
<br class="">
<pre id="codecell0" style="overflow: auto hidden; font-family: Consolas, Menlo, "DejaVu Sans Mono", "Bitstream Vera Sans Mono", monospace; font-size: 0.9em; background: rgb(238, 238, 238); padding: 7px 30px; margin: 15px 0px; line-height: 1.3em; color: rgb(62, 67, 73); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;" class="">zlib_save = zstd</pre>
<br class="">
and restarted dovecot - <br class="">
<br class="">
now I have following log file errors : <br class="">
<br class="">
Aug 28 16:17:39 lxc-imap dovecot:
imap(rnowotny)<237930><H1kft/CtENRUclcc>: Error:
zlib_save: Unknown handler: zstd<br class="">
Aug 28 16:17:44 lxc-imap dovecot:
imap(rprager)<237939><p5hst/Ct8evAqKhu>: Error:
zlib_save: Unknown handler: zstd<br class="">
Aug 28 16:17:44 lxc-imap dovecot:
imap(rprager)<237940><Vp5st/Ct8uvAqKhu>: Error:
zlib_save: Unknown handler: zstd<br class="">
Aug 28 16:17:44 lxc-imap dovecot:
imap(rprager)<237941><U31tt/Ct8+vAqKhu>: Error:
zlib_save: Unknown handler: zstd<br class="">
...<br class="">
<br class="">
<br class="">
what I do wrong here ? <br class="">
<br class="">
<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">Am 28.08.2020 um 13:15 schrieb Timo
Sirainen:<br class="">
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<blockquote type="cite" cite="mid:45761B39-9221-4892-823F-4E390F4C040B@sirainen.com" class="">
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On 28. Aug 2020, at 12.10, Robert Nowotny <<a href="mailto:rnowotny@rotek.at" class="" moz-do-not-send="true">rnowotny@rotek.at</a>>
wrote:<br class="">
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<div class=""> <font class="" face="Courier New">unfortunately
after re-installing </font><font class="" face="Courier
New">2.3.11.3, those broken-pipe errors appear again.
(on different, new files) <br class="">
so for sure there is something broken with zlib.<br class="">
I will go back to</font><font class="" face="Courier
New"><font class="" face="Courier New"> 2.3.10.1 now.<br class="">
attached is the configuration file, though it did not
change between </font></font><font class="" face="Courier New"><font class="" face="Courier New"><font class="" face="Courier New"><font class="" face="Courier New">2.3.10.1</font></font></font> </font><font class="" face="Courier New">and </font><font class="" face="Courier New"><font class="" face="Courier New">2.3.11.3<br class="">
</font></font></div>
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</div>
<div class="">Oh, this is with xz, not with gz like we first thought.
There are some known problems with xz, which is why we are
planning on removing it entirely. I'm not sure why v2.3.11
breaks it, although there are some changes related to it but
it might be coincidence. I can't reproduce this problem
though.</div>
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</div>
<div class="">In any case, I'd recommend switching to zlib or to zstd in
v2.3.12. (In theory you could leave the existing mails
xz-compressed, but best would be to re-compress everything via
dsync so old mails can be read when we eventually remove xz
support.)</div>
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</blockquote>
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