Feature changed by: Michal Svec (msvec) Feature #314470, revision 8 - Title: support the technical such as "Intellicache" of xen + Title: Support the technical such as "Intellicache" of xen - openSUSE Distribution: Unconfirmed - Priority - Requester: Important Requested by: yi li (liyicybertan123) Partner organization: openSUSE.org Description: support the feature such as "Intellicache" The basic idea behind Intellicache is that it allows you take some of the pressure off of your shared storage by offloading IO onto host local storage. Discussion: #1: yi li (liyicybertan123) (2013-07-30 14:35:07) sorry i am not familiar with this feature, this feature idea is come form the Citrix Xen. + #2: Michal Svec (msvec) (2013-08-06 15:48:09) + We need more details what exactly is requested. -- openSUSE Feature: https://features.opensuse.org/314470

Feature changed by: chen zhen (hydracz) Feature #314470, revision 10 Title: Support the technical such as "Intellicache" of xen Requested by: yi li (liyicybertan123) Partner organization: openSUSE.org Description: support the feature such as "Intellicache" The basic idea behind Intellicache is that it allows you take some of the pressure off of your shared storage by offloading IO onto host local storage. Discussion: #1: yi li (liyicybertan123) (2013-07-30 14:35:07) sorry i am not familiar with this feature, this feature idea is come form the Citrix Xen. #2: Michal Svec (msvec) (2013-08-06 15:48:09) We need more details what exactly is requested. #3: yi li (liyicybertan123) (2013-08-08 15:53:36) (reply to #2) IntelliCache is a XenServer feature that can be used in a XenDesktop deployment to cache temporary and non‐persistent operating‐system data on the local XenServer host. IntelliCache is available for Machine Creation Services (MCS)‐based desktop workloads that use NFS storage. In a typical XenDesktop configuration (without IntelliCache), desktop VMs read the operating‐system data from a master image on a costly shared storage array. When IntelliCache is enabled, a portion of the virtual‐machine runtime reads and writes occur on low‐cost local storage: XenServer caches the operating‐system files on its local hard drive in a Read Cache. Likewise, when IntelliCache is enabled, each desktop VM writes to its own Write Cache on the local host, preventing writes to shared storage. As a result of caching on local storage, when IntelliCache is configured for a pooled desktop, it significantly reduces the load on the remote storage and the amount of network traffic. Without IntelliCache, each desktop VM reads data from the master image on the shared storage and writes data to its virtual disk on the shared storage. However, with IntelliCache enabled for Pooled Desktops, desktop VMs cache most read data locally, so they only need to read from the shared storage when data is not available in their local cache. Likewise, desktop VMs write to their own Write Cache on + #4: chen zhen (hydracz) (2013-08-09 08:39:19) + As my discussion with Huawei customer, this requirement can be + cancelled, but they still interesting all new technology which can + improve KVM performance. we will open other FATE then, -- openSUSE Feature: https://features.opensuse.org/314470

Feature changed by: Michal Svec (msvec) Feature #314470, revision 12 Title: Support the technical such as "Intellicache" of xen Requested by: yi li (liyicybertan123) Partner organization: openSUSE.org Description: - support the feature such as "Intellicache" The basic idea behind - Intellicache is that it allows you take some of the pressure off of - your shared storage by offloading IO onto host local storage. + Support the feature such as "Intellicache". + The basic idea behind Intellicache is that it allows you take some of + the pressure off of your shared storage by offloading IO onto host + local storage. + Relations: + - Add cachefilesd to enable FS-cache (CacheFiles) (feature/id: 316319) Discussion: #1: yi li (liyicybertan123) (2013-07-30 14:35:07) sorry i am not familiar with this feature, this feature idea is come form the Citrix Xen. #2: Michal Svec (msvec) (2013-08-06 15:48:09) We need more details what exactly is requested. #3: yi li (liyicybertan123) (2013-08-08 15:53:36) (reply to #2) IntelliCache is a XenServer feature that can be used in a XenDesktop deployment to cache temporary and non‐persistent operating‐system data on the local XenServer host. IntelliCache is available for Machine Creation Services (MCS)‐based desktop workloads that use NFS storage. In a typical XenDesktop configuration (without IntelliCache), desktop VMs read the operating‐system data from a master image on a costly shared storage array. When IntelliCache is enabled, a portion of the virtual‐machine runtime reads and writes occur on low‐cost local storage: XenServer caches the operating‐system files on its local hard drive in a Read Cache. Likewise, when IntelliCache is enabled, each desktop VM writes to its own Write Cache on the local host, preventing writes to shared storage. As a result of caching on local storage, when IntelliCache is configured for a pooled desktop, it significantly reduces the load on the remote storage and the amount of network traffic. Without IntelliCache, each desktop VM reads data from the master image on the shared storage and writes data to its virtual disk on the shared storage. However, with IntelliCache enabled for Pooled Desktops, desktop VMs cache most read data locally, so they only need to read from the shared storage when data is not available in their local cache. Likewise, desktop VMs write to their own Write Cache on #4: chen zhen (hydracz) (2013-08-09 08:39:19) As my discussion with Huawei customer, this requirement can be cancelled, but they still interesting all new technology which can improve KVM performance. we will open other FATE then, #5: Michal Svec (msvec) (2013-08-09 18:48:14) The use case is still valid, but we need to think about the best way how this would work. + #6: Michal Svec (msvec) (2013-08-12 16:23:07) + I believe that FATE #316319 could be used to address this use case + (provided that NFS is used as a storage). -- openSUSE Feature: https://features.opensuse.org/314470