Version 1.96

Werner Gold <wgold@redhat.com> · Fri, 30 May 2014 14:45:15 +0200

Many thanks to Alasdair and Heinz for the hint with the tagging feature.
More convenient than dealing with UUIDs.

I also stumbled across the "same VG" issue when I tried to set up the
test environment. Thanks to Richard for that hint. :-)

I ran bonnie++ on my X230 (RHEL7) here where I used an external USB3
SSD. Attached you find the results.

With cache, there is a significant difference in random create. That's
what I would expect from an SSD cache.

Werner
-- 
Werner Gold                                    wgold@redhat.com
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Charles Cachera

Title: Bonnie++ Benchmark results

 Bonnie dm-cache first run without cache 

Version 1.96 Sequential Output Sequential Input Random
Seeks Sequential Create Random Create
Size Per Char Block Rewrite Per Char Block Num Files Create Read Delete Create Read Delete
K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU
dhcp86.gold 31176M 1888 94 79527 3 32969 2 4071 98 88300 3 179.3 6 16 13345 35 +++++ +++ 25022 30 13021 34 +++++ +++ 25950 34
Latency 5022us 282ms 223ms 3349us 258ms 686ms Latency 26160us 82us 86us 11553us 97us 1232us

 Bonnie second Run without cache 

Version 1.96 Sequential Output Sequential Input Random
Seeks Sequential Create Random Create
Size Per Char Block Rewrite Per Char Block Num Files Create Read Delete Create Read Delete
K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU
dhcp86.gold 31176M 1912 93 80326 3 32887 2 4128 98 88336 3 187.0 6 16 13414 35 +++++ +++ 29374 36 17368 45 +++++ +++ 23683 30
Latency 4963us 100ms 227ms 6850us 227ms 310ms Latency 1006us 89us 80us 7576us 7us 2120us

 Bonnie with cache 20 GB SSD USB3 

Version 1.96 Sequential Output Sequential Input Random
Seeks Sequential Create Random Create
Size Per Char Block Rewrite Per Char Block Num Files Create Read Delete Create Read Delete
K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU
dhcp86.gold 31176M 1874 94 79317 3 33381 3 3492 90 89812 4 175.4 6 16 11373 30 +++++ +++ 22227 27 12312 32 +++++ +++ 27129 35
Latency 4787us 99756us 1725ms 66649us 247ms 421ms Latency 9701us 99us 440us 957us 9us 2139us

 50 GB SSD USB3 Volume 

Version 1.96 Sequential Output Sequential Input Random
Seeks Sequential Create Random Create
Size Per Char Block Rewrite Per Char Block Num Files Create Read Delete Create Read Delete
K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU K/sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU /sec % CPU
dhcp86.gold 31176M 2009 99 222798 9 75933 5 4182 99 259103 8 3231 83 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
Latency 6191us 99859us 21786us 2753us 5604us 7597us Latency 1157us 83us 72us 1069us 8us 2128us

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Re: Testing the new LVM cache feature

Bonnie dm-cache first run without cache

Bonnie second Run without cache

Bonnie with cache 20 GB SSD USB3

50 GB SSD USB3 Volume