is the object-map feature supported for the RBD images?
dbutti
28 Posts
July 7, 2021, 4:40 pmQuote from dbutti on July 7, 2021, 4:40 pmHello; it seems that adding the object-map feature to the RBD images could speed up certain operations such as the removal of them.
I know that I can manually create images with this feature, and consume them with Ceph clients in userspace, but I would like to know: would that work at the iSCSI level, or is this function somehow incompatible with other layers/components of Petasan?
Thanks in advance,
Hello; it seems that adding the object-map feature to the RBD images could speed up certain operations such as the removal of them.
I know that I can manually create images with this feature, and consume them with Ceph clients in userspace, but I would like to know: would that work at the iSCSI level, or is this function somehow incompatible with other layers/components of Petasan?
Thanks in advance,
admin
2,930 Posts
July 7, 2021, 10:35 pmQuote from admin on July 7, 2021, 10:35 pmYou can use it in PetaSAN but not recommended. If you use it, you should set your clients to use active/passive multipath rather that active/active, if set to active/active it will still work but with degraded performance as each active gateway will need to grab an exclusive lock which slow things down.
Object map will speed up deletion if the disk was mostly not written to..meaning you created a large image but only written a small portion of it, but if you already wrote data, Object map will not speed deletion.
You can use it in PetaSAN but not recommended. If you use it, you should set your clients to use active/passive multipath rather that active/active, if set to active/active it will still work but with degraded performance as each active gateway will need to grab an exclusive lock which slow things down.
Object map will speed up deletion if the disk was mostly not written to..meaning you created a large image but only written a small portion of it, but if you already wrote data, Object map will not speed deletion.
is the object-map feature supported for the RBD images?
dbutti
28 Posts
Quote from dbutti on July 7, 2021, 4:40 pmHello; it seems that adding the object-map feature to the RBD images could speed up certain operations such as the removal of them.
I know that I can manually create images with this feature, and consume them with Ceph clients in userspace, but I would like to know: would that work at the iSCSI level, or is this function somehow incompatible with other layers/components of Petasan?
Thanks in advance,
Hello; it seems that adding the object-map feature to the RBD images could speed up certain operations such as the removal of them.
I know that I can manually create images with this feature, and consume them with Ceph clients in userspace, but I would like to know: would that work at the iSCSI level, or is this function somehow incompatible with other layers/components of Petasan?
Thanks in advance,
admin
2,930 Posts
Quote from admin on July 7, 2021, 10:35 pmYou can use it in PetaSAN but not recommended. If you use it, you should set your clients to use active/passive multipath rather that active/active, if set to active/active it will still work but with degraded performance as each active gateway will need to grab an exclusive lock which slow things down.
Object map will speed up deletion if the disk was mostly not written to..meaning you created a large image but only written a small portion of it, but if you already wrote data, Object map will not speed deletion.
You can use it in PetaSAN but not recommended. If you use it, you should set your clients to use active/passive multipath rather that active/active, if set to active/active it will still work but with degraded performance as each active gateway will need to grab an exclusive lock which slow things down.
Object map will speed up deletion if the disk was mostly not written to..meaning you created a large image but only written a small portion of it, but if you already wrote data, Object map will not speed deletion.