fts solr database size

Ricardo Branco ricardo at wenn.com
Tue Jul 15 11:05:59 UTC 2014

We are no way as big as you but in terms users but our user vs mailbox size is large.

50 users
425Gb (mdbox + zlib)

Note solr only indexes folders within a mailbox when a search is done on them so size can vary and most people dont 
realise that the default type of search in Thunderbird is on Sender/Recipients/Subject which happens localy and not on 
the server so you dont get solr indexing unless the user does a custom search and forces remote. Webmail systems though 
will  tend to do server searches.
Num Docs: 17m
Size: 4.5GB

Lazy wrote, On 15/07/2014 10:53:
> Hi,
> Could anyone share any numbers about real life solr database
> size/cpu/memory usage for
> certain amounts of messages ?
> We have now over 5TB of maildirs (about 5 000-6 000 concurrent imap clients)
> and I'm trying to guess how much hardware might be needed.

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