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