Single small file, Single file recall – Dell POWEREDGE R710 User Manual

Page 17

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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

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