<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
<div dir="auto">
<div dir="auto"><span style="font-family: sans-serif; font-size: 10pt;">On April 23, 2019 10:54:38 PM luckydog xf <luckydogxf@gmail.com> wrote:</span></div><div id="aqm-original" style="color: black;"><div class="aqm-original-body"><div style="color: black;">
<blockquote type="cite" class="gmail_quote" style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
<div dir="ltr"><div dir="ltr">Is it worthwile to use dbox? seeing from <a href="http://www.linuxmail.info/mbox-maildir-mail-storage-formats/">http://www.linuxmail.info/mbox-maildir-mail-storage-formats/</a> it may cause file lock and easy to corrupt. </div><div dir="ltr"><br></div></div></blockquote></div></div></div><div dir="auto">As with everything - it depends. You're asking me so these are *my* opinions - and I do not claim to be anything more than a hobbyist/tinkerer when the comes to this.</div><div dir="auto"><br></div><div dir="auto">mbox has potential use for long term read-only archives - I see no reason to use it for live mailboxes.</div><div dir="auto"><br></div><div dir="auto">maildir is undoubtedly the least susceptible to corruption. It's also the slowest format for reading. How slow is "slow" depends on your hardware - it may be imperceptible with enough RAM and SSD's - or it may result in user complaints with large mailboxes.</div><div dir="auto"><br></div><div dir="auto">dbox is Dovecot's preferred format. I know Timo has put a lot of effort into it. sdbox is similar to maildir in that each mail is a separate file. mdbox significantly reduces the number of files which can make file-based backups faster. Both dbox formats are dependent on their index files.</div><div dir="auto"><br></div><div dir="auto">If you've got good hardware, including a proper UPS, I'd recommend dbox (my server is presently using sdbox). With large mailboxes and file-based backups you'll benefit from mdbox. When reliability is the #1 concern above anything else - use maildir. Depending on your use SIS can have significant impact on storage requirements - but storage these days is relatively cheap.</div><div dir="auto"><br></div><div dir="auto">I haven't seen much feedback from users actively using SIS - I'd love to hear from high traffic sites with SIS experience to know if the corruption issues have been resolved. In my case there was at least a 30% reduction in space but I had too many errors - admittedly it's been a couple years since I last tried it.</div><div dir="auto"><br></div><div dir="auto"><div dir="auto" style="font-family: sans-serif;">--</div><div dir="auto" style="font-family: sans-serif;">Daniel</div></div>
</div></body>
</html>