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On 30 Oct 99, at 0:59, Heman Lu wrote:
> Hi,
>
> I'm planning to migrate our mail server from sendmail
> to qmail. There are 55,000+ mail accounts. When simulating
> to grow beyond 65,536 accounts, I encounter some problems.
>
> Here is my test environment:
>
> Hardware: Acer Altos 12000
> -- Pentium III 450 x 2
> -- 1 GB DRAM
> -- IBM Ultra2 SCSI Disk 9GB x 7 (as RAID 5)
>
> Software: RedHat Linux 6.1
> -- With shadow passwd
> -- qmail 1.0.3
>
> The major problem is for all the accounts with UID larger
> than 65,535 are invalid when chown, su or checkpassword for
> qmail-pop3d. But I still can do getpwnam and getpwent perfectly
> by Perl or C. There is no such a problem in Solaris 2.6.
AFAIK, the number of accounts in linux in general is limited by
16bits. I don't know if you can only recompile - the problem _may_
be in glibc, and in ext2 filesystem. (NIS/NIS+ might help - I have
never tried that.)
If you do NOT need them as separate login accounts, but mail-only
accounts, you can use a single-UID setup; I think www.qmail.org
has a page on how. Basically, you have one account for all the
mailboxes and you use qmail-users mechanism to deliver in
specific maildirs, and patched checkpassword to select the right
maildir on pop3 login. (I don't know if you can do with mailboxes...)
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--
Petr Novotny, ANTEK CS
[EMAIL PROTECTED]
http://www.antek.cz
PGP key ID: 0x3BA9BC3F
-- Don't you know there ain't no devil there's just God when he's drunk.
[Tom Waits]
