<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:宋体;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:等线;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"\@等线";
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Segoe UI";
panose-1:2 11 5 2 4 2 4 2 2 3;}
@font-face
{font-family:"\@宋体";
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:12.0pt;
font-family:宋体;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:等线;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:等线;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:445976134;
mso-list-template-ids:-1334134588;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:36.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:72.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:108.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:144.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:180.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:216.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:252.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:288.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:324.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:等线'>But, the docs list these types:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:等线'><o:p> </o:p></span></p><p style='mso-margin-top-alt:10.5pt;margin-right:0cm;margin-bottom:10.5pt;margin-left:0cm;background:#FCFBFA'><span lang=EN-US style='font-family:"Segoe UI",sans-serif;color:#1A1816'>There are number of volume types you can use:<o:p></o:p></span></p><ul style='margin-top:0cm;box-sizing: border-box' type=disc><li style='color:#1A1816;margin-top:0cm;margin-bottom:6.0pt;mso-list:l0 level1 lfo1;background:#FCFBFA;box-sizing: border-box'><strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'>Distributed:</span></strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'> Distributes files randomly across the bricks in the volume. You can use distributed volumes where the requirement is to scale storage and the redundancy is not required, or is provided by other hardware/software layers. Disk/server failure can result in a serious loss of data as it is spread randomly across the bricks in the volume.<o:p></o:p></span></li><li style='color:#1A1816;margin-top:0cm;margin-bottom:6.0pt;mso-list:l0 level1 lfo1;background:#FCFBFA;box-sizing: border-box'><strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'>Replicated:</span></strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'> Replicates files across bricks in the volume. You can use replicated volumes when high-availability is required.<o:p></o:p></span></li><li style='color:#1A1816;margin-top:0cm;margin-bottom:6.0pt;mso-list:l0 level1 lfo1;background:#FCFBFA;box-sizing: border-box'><strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'>Distributed Replicated:</span></strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'> Distributes files across replicated bricks in the volume. You can use distributed replicated volumes to scale storage and for high-availability and high-reliability. Distributed replicated volumes offer improved read performance.<o:p></o:p></span></li><li style='color:#1A1816;margin-top:0cm;margin-bottom:6.0pt;mso-list:l0 level1 lfo1;background:#FCFBFA;box-sizing: border-box'><strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'>Dispersed:</span></strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'> Provides space efficient protection against disk or server failures (based on erasure codes). This volume type stripes the encoded data of files, with some redundancy added, across multiple bricks in the volume. Dispersed volumes provide a configurable level of reliability with minimum space waste.<o:p></o:p></span></li><li style='color:#1A1816;margin-top:0cm;margin-bottom:6.0pt;mso-list:l0 level1 lfo1;background:#FCFBFA;box-sizing: border-box'><strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'>Distributed Dispersed:</span></strong><span lang=EN-US style='font-family:"Segoe UI",sans-serif'> Distributes files across dispersed bricks in the volume. This has the same advantages of distributed replicated volumes, using dispersed instead of replicated to store the data to bricks.<o:p></o:p></span></li></ul><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:等线'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:等线'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:等线'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> hunter86_bg@yahoo.com <hunter86_bg@yahoo.com> <br><b>Sent:</b> Thursday, January 21, 2021 3:30 AM<br><b>To:</b> tommy <sz_cuitao@163.com><br><b>Cc:</b> gluster-users@gluster.org<br><b>Subject:</b> Re: [Gluster-users] about performance of different type volume .<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>Officially only replica type is "supported".<o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US>You can pick 'replica 3' or if your network is limited 'replica 3 arbiter 1'.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>The second type has only 2 copies of your data, which saves network bandwidth (only syncing to the other data brick), but also limits the reading speed (as you can only read locally or from the other data brick).<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>For performance, replica volumes are fastest, but you waste more space.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Best Regards,<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Strahil Nikolov<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>On Jan 20, 2021 11:19, tommy <<a href="mailto:sz_cuitao@163.com">sz_cuitao@163.com</a>> wrote:<o:p></o:p></span></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p><span lang=EN-US>Hi, every one:<o:p></o:p></span></p><p><span lang=EN-US> <o:p></o:p></span></p><p><span lang=EN-US>I want to know what type volume’s performance is best and what’s type is worst ?<o:p></o:p></span></p><p><span lang=EN-US> <o:p></o:p></span></p><p><span lang=EN-US>Is there some construction about it ?<o:p></o:p></span></p><p><span lang=EN-US> <o:p></o:p></span></p><p><span lang=EN-US>Thanks.<o:p></o:p></span></p><p><span lang=EN-US> <o:p></o:p></span></p><p><span lang=EN-US> <o:p></o:p></span></p></div></div></blockquote></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></div></body></html>