I hate to go on endlessly about Fastmail , but how sweet is this announcement today?!
All users email is now on replicated servers. This means that every email delivered or deleted and every email action performed is replicated within a second to a completely separate server with a completely separate copy of all users emails.
We now have at least three levels of redundancy, three copies of every email, and all those copies are on RAID redundant storage themselves.
- All users now have their email stored on a system with RAID disks and all servers and RAID arrays have dual power supplies. This means a single drive or power supply failure should cause no interruption to service at all, we just replace the drive/power supply while the system is live and online…
- All users now have their email replicated to an identical replica system (RAID drives, dual power supplies, etc). Each system is completely separate…. The replication is performed at the semantic email level, not at the filesystem level. So a filesystem corruption on the source server will not be replicated. This means if there is a disk or filesystem corruption on a single machine, we can just switch to the replica…
- All users have their email store backed up incrementally each night to a separate system and RAID array. The backups of email are kept for 1 week after the email is deleted to allow restoring in case of accident. In an emergency situation if both a master and replica server should fail catastrophically, we can still perform a restore from this backup…
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Tags: backup, email, fastmail, imap, RAID, redundancy, redundant storage, sweet dreams