Comments on: vSphere Flash Read Cache – Part 1: Intro and Sizing https://www.spectralcoding.com/2014/07/vsphere-flash-read-cache-part-1-intro-and-sizing/ My Technical Projects and Adventures Sun, 26 Apr 2020 01:50:41 +0000 hourly 1 https://wordpress.org/?v=6.3.1 By: Ishaan https://www.spectralcoding.com/2014/07/vsphere-flash-read-cache-part-1-intro-and-sizing/#comment-164021 Sun, 26 Apr 2020 01:50:41 +0000 https://www.spectralcoding.com/?p=183#comment-164021 Just a note that VFRC is discontinued in ESXi 7.
Here is a link on how our VirtuCache software compares with VFRC
https://virtunetsystems.com/vmware-vfrc-vflash-read-cache-competitor-virtunet-virtucache/
Thus far we (Virtunet Systems) are the only host side caching software that supports (1) caching reads and writes (2) all ESXi releases till ESXi 7 (3) VDI and server VMs

Disclosure – I am a SE for Virtunet

]]> By: Babak https://www.spectralcoding.com/2014/07/vsphere-flash-read-cache-part-1-intro-and-sizing/#comment-121822 Mon, 11 Mar 2019 07:25:00 +0000 https://www.spectralcoding.com/?p=183#comment-121822 so thanks
but actually could not get a clear answer :
this is my output :

Histogram: IO lengths of commands for virtual machine worldGroupID : 2193013, virtual disk handleID : 8275 (scsi0:0) {
min : 512
max : 49152
mean : 6174
count : 41373
{
84 (<= 512)
166 (<= 1024)
40 (<= 2048)
21 (<= 4095)
27231 (<= 4096)
25 (<= 8191)
8551 (<= 8192)
3646 (<= 16383)
1184 (<= 16384)
423 (<= 32768)
2 (<= 49152)
0 (<= 65535)
0 (<= 65536)
0 (<= 81920)
0 (<= 131072)
0 (<= 262144)
0 ( 524288)
}
}
Histogram: IO lengths of Read commands for virtual machine worldGroupID : 2193013, virtual disk handleID : 8275 (scsi0:0) {
min : 9223372036854775807
max : -9223372036854775808
mean : 0
count : 0
{
0 (<= 512)
0 (<= 1024)
0 (<= 2048)
0 (<= 4095)
0 (<= 4096)
0 (<= 8191)
0 (<= 8192)
0 (<= 16383)
0 (<= 16384)
0 (<= 32768)
0 (<= 49152)
0 (<= 65535)
0 (<= 65536)
0 (<= 81920)
0 (<= 131072)
0 (<= 262144)
0 ( 524288)
}
}
Histogram: IO lengths of Write commands for virtual machine worldGroupID : 2193013, virtual disk handleID : 8275 (scsi0:0) {
min : 512
max : 49152
mean : 6174
count : 41373
{
84 (<= 512)
166 (<= 1024)
40 (<= 2048)
21 (<= 4095)
27231 (<= 4096)
25 (<= 8191)
8551 (<= 8192)
3646 (<= 16383)
1184 (<= 16384)
423 (<= 32768)
2 (<= 49152)
0 (<= 65535)
0 (<= 65536)
0 (<= 81920)
0 (<= 131072)
0 (<= 262144)
0 ( 524288)
}
}

Now how can define reservation and block size ?

]]> By: Loz https://www.spectralcoding.com/2014/07/vsphere-flash-read-cache-part-1-intro-and-sizing/#comment-119109 Mon, 26 Nov 2018 15:50:45 +0000 https://www.spectralcoding.com/?p=183#comment-119109 Great article, really helped me get my head around this topic.

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