We have just implemented a new backup solution that should secure your data even better. So far we have been doing server backups once a day, now we have a hot-backup server that holds an up-to-date copy of the main database. If the main database server fails we still have the data you have entered seconds before! The uploaded files are archived every 2 hours to a remote server too.
To summarize our backup and data storage policy:
- we use redundant disks on the main servers — nothing happens if a disk fails
- hot-backup database server with redundant disks — data is not lost when main server fails
- backup of uploaded files every 2 hours
- full backup to a server in a different datacenter every few days
- backups of individual sites are available for download via Site Manager » backup
We are also struggling to provide the highest availability possible. In fact during 1 year operation we have experienced about 22 h outage all together, from which 18 hours were caused by our hosting provider. This makes about 99.7% availability (it would be 99.95% if you exclude network problems in the datacenter) which is not bad after all, however we have plans to improve this dramatically, by 1. moving to another datacenter, 2. building a high-availability cluster with redundant servers.
Michał Frąckowiak @ Wikidot Inc.
Visit my blog at michalf.me
