HDD Sizing, disk space and partitioning

Sonassi will partition disks with the following proportions.

These partitions are of static proportion, regardless of disk size

/                30G                    Root filesystem (for host OS and node OS)
swap             2.5G                   Swap partition
logs             2G                     Local log file storage
config           0.5G                   MageStack configuration storage
total            35G                    Total reserved capacity

These partition sizes will vary dependant on the HDD capacity available

capacity (c)     disk_size - 35         Usable capacity
domains  (d)     9c / 24                Document root storage
mysql    (m)     3c / 24                MySQL & SOLR storage
backups  (b)     5c / 12                Local backup storage

disk_size is generally around 93% of the overall storage capacity, as some space has to be utilised for meta-data storage and LVM snapshot storage.

2 Drive configuration examples

In a 2 drive configuration, 2 drives are used for the entire solution storage in a RAID 1 array.

The default static partitions plus

	100GB	200GB	400GB
Domains	30G	61G	134G
MySQL	10G	21G	45G
Backups	33G	67G	149G

4 Drive configuration examples

In a 4 drive configuration, 2 drives are dedicated to backup storage and 2 drives are used for solution storage; comprised of two separate RAID 1 arrays.

The default static partitions plus

	800GB	1600GB	3200GB
Domains	282G	643G	1298G
MySQL	94G	214G	432G
Backups	313G	715G	1442G

6 Drive configuration examples

In a 8 drive configuration, 4 drives are dedicated to backup storage and 4 drives are used for solution storage; comprised of two separate RAID 1 arrays.

The default static partitions plus

	6400GB
Domains	2607G
MySQL	869G
Backups	2897G

12 Drive configuration examples

In a 12 drive configuration, 6 drives are dedicated to backup storage and 6 drives are used for solution storage; comprised of two separate RAID 1 arrays.

The default static partitions plus

	6400GB
Domains	3916G
MySQL	1305G
Backups	4351G

16 Drive configuration examples

In a 16 drive configuration, 8 drives are dedicated to backup storage and 8 drives are used for solution storage; comprised of two separate RAID 1 arrays.

The default static partitions plus

	1200GB
Domains	5225G
MySQL	1741G
Backups	5806G

Download the MageStack disk calculator in Excel format