HP StorageWorks Scalable File Share System Installation and Upgrade Guide Version 2.2

EVA4000 storage — overview and planning 5–7
5.1.3.2.2 EVA4000 configuration example 2 — small system
Table 5-2 shows how to configure LUNs in a system comprised of four servers and four EVA4000 arrays. In
this configuration, you can create a file system comprised of one MDS service and eight OST services. This
configuration assumes that servers south[1-2] run OST services in addition to running the MDS service.
Table 5-2 Small system example
Array Disk Group Size Role Presented to Notes
1 140GB
1
1. Can be configured to a different size.
adm south[1-2] The administration LUN.
21GBservice south[1-2] The service LUN for south1 and south2.
1Size can
vary
mds south[1-2] An MDS LUN. See Section 5.5 for information
on sizing the MDS LUN.
2Size can
vary
mds south[1-2] The second of the pair of LUNs for the MDS
service.
1 Uses
remaining
capacity
(90% rule)
ost south[1-2] The first OST LUN. The size is the space
remaining (out of 90% of actual capacity)
after administration and MDS LUNs have
been created, and allowance has been made
for redundancy overheads.
2 Uses
remaining
capacity
(90% rule)
ost south[1-2] The second OST LUN. The size is the space
remaining (out of 90% of actual capacity)
after the service and MDS LUNs have been
created, and allowance has been made for
redundancy overheads.
2 1 Uses 90%
capacity
ost south[1-2] The third OST LUN. You must leave 10% of
actual capacity unused, and allow for
redundancy overheads.
2 Uses 90%
capacity
ost south[1-2] The fourth OST LUN. You must leave 10% of
actual capacity unused, and allow for
redundancy overheads.
3 11GBservice south[3-4] The service LUN for south3 and south4.
1 Uses
remaining
capacity
(90% rule)
ost south[3-4] The fifth OST LUN. You must leave 10% of
actual capacity unused, and allow for
redundancy overheads.
2 Uses 90%
capacity
ost south[3-4] The sixth OST LUN. You must leave 10% of
actual capacity unused, and allow for
redundancy overheads.
4 1 Uses 90%
capacity
ost south[3-4] The seventh OST LUN. You must leave 10% of
actual capacity unused, and allow for
redundancy overheads.
2 Uses 90%
capacity
ost south[3-4] The eighth OST LUN. You must leave 10% of
actual capacity unused, and allow for
redundancy overheads.