Rbd exclusive lock

WebMar 11, 2024 · > > > > As discussed in this thread, for active/passive, upon initiator > > failover, we used the RBD exclusive-lock feature to blacklist the old > > "active" iSCSI target gateway so that it cannot talk w/ the Ceph > > cluster before new writes are accepted on the new target gateway. WebThe use case is providing a building block > for users building their own orchestration on top of RBD. > > The matrix is as follows: > > - unmanaged/exclusive "rbd lock add" > > - unmanaged/shared "rbd lock add --shared" > > - managed/exclusive with exclusive-lock image feature > automatic transitions > > - managed/exclusive without exclusive-lock …

rbd请求是互斥的？ 小甲师兄

Weblock add [--shared lock-tag] image-spec lock-id. Lock an image. The lock-id is an arbitrary name for the user’s convenience. By default, this is an exclusive lock, meaning it will fail if … WebKernel module client supports features like Deep flatten, Layering, Exclusive lock, Object map, and Fast diff. Object map, Fast diff, and Deep flatten features require Red Hat … eastern powersports limited https://frikingoshop.com

Ceph RBD：exclusive-lock代码详解 + 使用方法-CSDN博客

WebOct 18, 2024 · Oct 18 02:03:33 node1.ceph tcmu-runner[1650]: tcmu_rbd_lock:446 rbd/rbd.vmware01: Acquired exclusive lock. maybe the additional load by the flapping OSDs makes it even worse? If OSDs are going down while a scrub is in progress then it could explain why commands are taking a long time. WebMar 24, 2024 · How can we see whether a lock is exclusive or shared? the rbd lock ls command output looks identical for the two cases. Thank you, Laszlo _____ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx Follow-Ups: Re: RBD Exclusive lock to ... WebMar 23, 2024 · You can disable features unsupported by >> the kernel with "rbd feature disable pool/truc object-map fast-diff >> deep-flatten". >> In some cases useful info is found in syslog - try "dmesg tail". >> rbd: map failed: (6) No such device or address >> # dmesg tail -1 >> [1108045.667333] rbd: image truc: image uses unsupported features: 0x38 ... eastern power andhra pradesh

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Rbd exclusive lock

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WebVersion-Release number of selected component (if applicable): any, ceph since release: Jewel "exclusive-lock" is enabled by default. How reproducible: very Steps to Reproduce: 1. create vm with ceph rbd disk image 2. virsh destroy vm 3. virsh start vm and put the vm under heavy disk write I/O Actual results: task jbd2/disk-8:171_blocked for more than 120 … WebMar 25, 2024 · The way --exclusive is implemented is the client simply > > refuses to release the lock when it gets the request to do so. This > > isn't tracked on the OSD side in any way so "rbd lock ls" doesn't have > > that information. > > > > > > if I understand correctly then the lock itself is an OSD "flag" but whether > > is treated as shared or ...

Rbd exclusive lock

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WebNov 23, 2024 · root@miles:~# rbd info lxdpool/container_fileserver rbd image 'container_fileserver': size 19 GiB in 4769 objects order 22 (4 MiB objects) snapshot_count: 21 id: 15452f1b586be block_name_prefix: rbd_data.15452f1b586be format: 2 features: layering op_features: flags: create_timestamp: Tue Nov 2 11:46:36 2024 … WebMar 17, 2024 · Lock mode is read only operation. Lock mode is read as well as write operation. 2. Shared lock can be placed on objects that do not have an exclusive lock already placed on them. Exclusive lock can only be placed on objects that do not have any other kind of lock. 3. Prevents others from updating the data.

WebMar 15, 2024 · 1 2: 1.rbd的exclusive_lock既然是互斥锁，那它的拥有者也就只有一个“人”，我们称他为owner 2.另一方面，虽然这是个互斥锁，但是很多客户端可以同时“拥有”这个互 … WebThe lock-id is an arbitrary name for the user's convenience. By default, this is an exclusive lock, meaning it will fail if the image is already locked. The --shared option changes this …

WebExclusive locks are used heavily in virtualization (where they prevent VMs from clobbering each other’s writes) and in RBD mirroring (where they are a prerequisite for journaling in … Web1: Layering support. Layering enables you to use cloning. 2: Striping v2 support. Striping spreads data across multiple objects. Striping helps with parallelism for sequential …

WebThe exclusive-lock feature must be enabled to enable persistent write log cache. The cache can be loaded only after the exclusive-lock is acquired. Exclusive-locks are enabled on newly created images by default unless overridden by the rbd_default_features configuration option or the --image-feature flag for the rbd create command.

WebKernel module client supports features like Deep flatten, Layering, Exclusive lock, Object map, and Fast diff. Object map, Fast diff, and Deep flatten features require Red Hat Enterprise Linux 8.2 and later. ... [root@rbd-client ~]# mkfs.xfs /dev/rbd0p1 meta-data=/dev/rbd0p1 isize=512 agcount=16, agsize ... eastern powersports ltdWebMar 15, 2024 · Subject: Re: iSCSI Multipath (Load Balancing) vs RBD Exclusive Lock; From: Mike Christie ; Date: Thu, 15 Mar 2024 02:48:42 -0500; Cc: Lazuardi Nasution , Ceph Users , shadow_lin ; In-reply-to: … cuisinart food processor bread doughWebCreate an rbd image with exclusive-lock feature rbd create disk02 --size 5120 --image-feature layering,exclusive-lock --image-format 2 # rbd info disk02 rbd image 'disk02': size 5120 MB in 1280 objects order 22 (4096 kB objects) block_name_prefix: rbd_data.10ae2ae8944a format: 2 features: layering, exclusive-lock flags: 2. Create … cuisinart food processor black fridayWebOct 6, 2024 · RBD mirroring uses exclusive locks and the journaling feature to record all modifications to an image in the order in which they occur. ... [ceph: root@site-a /]# rbd create image1 --size 1024 --pool data --image-feature exclusive-lock,journaling. Note. If exclusive-lock is already enabled, use journaling as the only argument, ... cuisinart food processor at macy\u0027sWebFeb 5, 2024 · 背景exclusive-lock为rbd image的一个feature，是一个分布式锁，主要用于防止多个客户端同时写入image导致数据不一致问题。基本概念介绍见Ceph官方文档即可。本 … eastern powersports cornwallWebRBD exclusive-lock feature in combination w/ Ceph client blacklisting to ensure that cannot occur. Upon path failover, the old RBD client is blacklisted from the Ceph cluster to ensure … eastern power networks wayleave departmentWebTake an exclusive lock on the image. Raises. ImageBusy if a different client or cookie locked it ImageExists if the same client and cookie locked it. lock_get_owners (self) ¶ Iterate over the lock owners of an image. Returns. LockOwnerIterator. lock_release (self) ¶ Release a managed lock on the image that was previously acquired. lock_shared ... eastern pregnancy information center kinston