![]() If a channel program attempts to return too large a value, the Successfully against a similar size system. Has run successfully once, you can guarantee that it will finish Note that because both the instruction countĪnd amount of memory used by a channel program are deterministic when runĪgainst the same inputs and filesystem state, as long as a channel program No attempt is made to reverse or undo any If the channel program exhausts an instruction or memory limit, aįatal error will be generated and the program will be stopped, leaving the If a fatal error is returned, the channel program may have notĮxecuted at all, may have partially executed, or may have fully executed butįailed to pass a return value back to userland. Will be accessible as an array stored in the argument table with the key If invoked from the command line, extra arguments to the Lua script Theĭefault memory limit is 10 MiB, and can be set to a maximum of 100Īll remaining argument strings will be passed directly to the LuaĪ channel program can be invoked either from the command line, orĪrguments passed to the channel program are converted to a Lua Memory than the given limit, it will be stopped and an error returned. If a channel program attempts to allocate more ![]() Instructions, and it can be set to a maximum of 100 million If a channel programĮxecutes more than the specified number of instructions, it will be t instruction-limit Limit the number of Lua instructions to execute. This flag, all pending changes must be synced to disk before a channel Properties and determining if changes would succeed (zfs.check.*). The program can be used to gather information such as The programĬannot change on-disk state by calling functions from the zfs.sync n Executes a read-only channel program, which runs faster. Theĭetails of such an error will be printed to standard error in plain When this flag is specifiedĪnd standard output is empty - channel program encountered an error. ![]() OPTIONS -j Display channel program output in JSON format. Run on pool, and any attempts to access or modify The channel program given by script will be Channel programs may only be run with root privileges.Ī modified version of the Lua 5.2 interpreter is used to runĬhannel program scripts. A library of ZFS calls is made available to channel program The entire script isĮxecuted atomically, with no other administrative operations taking effectĬoncurrently. Operations to be run programmatically as a Lua script. The ZFS channel program interface allows ZFS administrative We wish the OpenZFS community many more years of collaboration, and we at iX fully support all community efforts to continuously improve ZFS.Execute ZFS channel programs SYNOPSIS zfs Lastly, this was the 10th anniversary of the OpenZFS Developer Summit and the attendees were excited to meet again and interact with each other in person for this special occasion. Prizes were awarded to the top-rated sessions at the end of the event. Topics ranged from demos, completed code, and improved documentation. It was great to see this increase in OpenZFS adoption, competition, and new offerings leveraging OpenZFS.ĭay 2 of the Summit consisted of a hackathon where experts including Alexander Motin presented some of the projects they have been working on. Amazon and Nutanix described their ZFS-based products. The tremendous success and robust features of OpenZFS have also attracted more Enterprise vendors to use OpenZFS within their product suites. Several presenters also shared their work on improvements, safety, and performance of OpenZFS. These efforts have reduced CPU usage and memory bandwidth on both metadata and data stages by more than 50% for both small and large blocks.Īllan Jude from Klara Systems also discussed his work on Enabling Storage Multi-Tenancy with ZFS for Containers ( Video | Slides) where he reviewed prototypes in multi-tenant and container environments to continue to increase the capabilities of ZFS. iXsystems Engineering Fellow, Alexander Motin, presented the improvements to ZFS performance ( Video | Slides) he worked on in 2022, which include ZFS Scrub Performance, Pool Import Time, and Speculative Prefetch. ![]() There were several interesting presentations at this year’s conference. Here is a list of presentations from Day 1: Titleįor additional videos, visit the OpenZFS YouTube channel. Day 2 was devoted to a hackathon, with plenty of opportunities to interact with fellow attendees. The first day consisted of various talks and discussions.
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