Hi Ulrich, you maybe misunderstood my purpose, i am not going to do caching on iSCSI transport layer. you are right that iSCSI devices can be cached just as normal block devices are. indeed a normal block device can be cached using memory to cache the hot data. but iscsi driver has differences with normal block device, after all it's a remote disk. so i want to use a normal block device to act as a cache disk for iscsi device besides using the normal memory cache. do you have any suggestions? thank you!
2016-10-10 21:43 GMT+08:00 Ulrich Windl <[email protected]>: > The iSCSI transport layer is definitely the wrong place to do caching! > iSCSI devices are cached just as normal block devices are (unless you use > direct I/O). > > >>> ??? <[email protected]> schrieb am 10.10.2016 um 11:46 in Nachricht > <[email protected]>: > > > > > does iSCSI protocol itself or open-source iSCSI implementations like > > open-iscsi have a cache scheme? > > > > since an iscsi initiator may access the same data many times, it does not > > have to get the data from remote target every time via network. so i am > > wondering if iSCSI provides a scheme by which clients can use a local > disk > > to cache the hot data so that when the accessed data is stored in the > local > > cache disk initiator can directly get the data from local disk, just > like a > > web browser cache does. does anyone konw about this? > > > > how can i implement this? thank you. > > > > > > -- > > You received this message because you are subscribed to the Google Groups > > "open-iscsi" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at https://groups.google.com/group/open-iscsi. > > For more options, visit https://groups.google.com/d/optout. > > > > > -- > You received this message because you are subscribed to a topic in the > Google Groups "open-iscsi" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/open-iscsi/uVZSZV1pz1M/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/open-iscsi. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
