Dell POWEREDGE R710 - Manual (Page 17)

Dell HPC Tiered Storage Solution
Page 15
Single small file
The fourth test that was done is actually the inverse of the first test. That is, it measures the amount
of time to recall the data from the LTS to the primary storage. The results are summarized in Table 5.4
below.
Single file recall
The final test examines the impact of migrating data using multiple tape drives. One to six drives were
used in the testing with the resulting throughput in MB/s listed in Table 5.5 below.
0
50
100
150
200
4KB 512KB 1MB 100MB 1GB
T
ime (
se
con
d
s)
File Size
Migrate and verify a single small file from Primary tier (NSS) to LTS
tier (Tape)
File Transfer Time
Complete Job (Tape
Load/Write)
0
10
20
30
40
50
60
1GB 10GB 100GB 1TB 5TB 10TB
T
ime (
h
o
u
rs)
File Size
Time it takes to Recall a file from LTS tier (Tape) to Primary tier (NSS)
Native (no compression)
Compressed 2:1 ratio