This is a multipart message in MIME format. ------=_NextPart_000_0001_01D02070.75A22150 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Everyone ! Recently I am reading some documents about vmeare virtual flash <http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=di splayKC&externalId=2058983> and citrix IntelliCache <http://support.citrix.com/article/CTX129052> . I am wondering if we can add some feature like that into ovirt . Then I found something like bcache and flash cache. After changing some code , I tried bcache in an old version of ovirt node . It works for just one node . But when I add another node to the data center, the problem occurred . When I write some data into node A, the data will be stored in node A's cache and iscsi server. But the cache of node B does not know the change . the data in node B's cache still the old one. In vmware's solution and citrix's solution , it seemed they have some way to solve this problem . Do you have any idea ? Thanks ------=_NextPart_000_0001_01D02070.75A22150 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" = xmlns:o=3D"urn:schemas-microsoft-com:office:office" = xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" = xmlns=3D"http://www.w3.org/TR/REC-html40"><head><META = HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Dus-ascii"><meta name=3DGenerator content=3D"Microsoft Word 15 = (filtered medium)"><style><!-- /* Font Definitions */ @font-face {font-family:\5B8B\4F53; 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:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:"\@\5B8B\4F53"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Calibri","sans-serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:#954F72; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:"Calibri","sans-serif"; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} /* Page Definitions */ @page WordSection1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN = link=3D"#0563C1" vlink=3D"#954F72" = style=3D'text-justify-trim:punctuation'><div class=3DWordSection1><p = class=3DMsoNormal><span lang=3DEN-US>Hi Everyone = !<o:p></o:p></span></p><p class=3DMsoNormal><span = lang=3DEN-US><br> Recently I am reading some = documents about <a = href=3D"http://kb.vmware.com/selfservice/microsites/search.do?language=3D= en_US&cmd=3DdisplayKC&externalId=3D2058983">vmeare virtual = flash</a> and <a = href=3D"http://support.citrix.com/article/CTX129052">citrix = IntelliCache</a> . I am wondering if we can add some feature like that = into ovirt .<o:p></o:p></span></p><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>Then I found something = like bcache and flash cache. <o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>After changing some code = , I tried bcache in an old version of ovirt node . It works for just one = node . <o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>But when I add another = node to the data center, the problem occurred . <o:p></o:p></span></p><p = class=3DMsoNormal style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>When I write some data = into node A, the data will be stored in node A’s cache and iscsi = server.<o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>But the cache of node B = does not know the change . the data in node B’s cache still the = old one.<o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>In vmware’s = solution and citrix’s solution , it seemed they have some way to = solve this problem .<o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>Do you have any idea = ?<o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span lang=3DEN-US>Thanks = <o:p></o:p></span></p><p class=3DMsoNormal = style=3D'text-indent:21.0pt'><span = lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span = lang=3DEN-US><o:p> </o:p></span></p></div></body></html> ------=_NextPart_000_0001_01D02070.75A22150--