On Wed, Mar 12, 2014, at 08:11 PM, Marco wrote: > > On Mon, Mar 10, 2014, at 07:49 PM, Marco wrote: > >> With 8GB RAM, > > > > I would recommend you increase that... > [...] > > As an interesting datapoint, the big ones cost about US$20k fully > > stocked, including 40Tb of RAID6 storage for email, plus 6Tb of > > RAID1 for search indexes and 800Gb of RAID1 SSD for hot metadata. > [...] > > Hello, > > with these servers could you tell me what is the average number of > IMAP processes (connections) opened? Just for understand a real > example relationship between memory and processes. Looks like on a medium-loaded server we have about 15,000 connections open at the moment. It's about 40% masters, 40% replicas, 20% unallocated. > About disk, what is the high size of a single partition managed by Cyrus? We're just using a single partition (default) in each instance of Cyrus, but there are multiple instances installed. The config is somewhat complex, we're running a patch which enables 'archive' storage. It's a little bit buggy still, but good enough for our purposes with some babysitting. The 'spool' path is on a shared SSD (400Gb x RAID1), but there's a separate archive partition for each slot with 1Tb of space allocated. So overall it's laid out as two x 12 drive RAID6 of 2Tb drives, each with a 20Tb volume which is them configured with GPT partition table as 20 separate 1Tb partitions. There's also a separate 3-drive RAID 1e (3Tb storage striped over 3 disks) with search data, using yet another set of patches which integrate the Xapian search engine into our Cyrus system for fast full-text searches. I've nearly finished writing a blog post which incidentally glances over some of this stuff while talking about a recent outage. Bron. -- Bron Gondwana brong@xxxxxxxxxxx ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
