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Stuff I'm playing with, thinking about, or watching admiringly... == Mount == === Testing and documentation === * Add real unit testing * Construct a set of specifications for mount behavior * Rewrite nfs(5) * Test "-o remount" -- handled by /usr/sbin/mount instead of /sbin/mount.nfs? === UI clean up === * Make error reporting more useful ** Some error messages are too specific ("RPC Error: RPC program not available" is meaningless to most users) ** Some error messages are too general ("mount.nfs: mount failed" doesn't explain how to rectify the problem) * Complete internationalization === New features === * Implement support for IPv6 * Implement support for server failover options * Add scalable mounting (more efficient use of network resources; mountd connection caching) * Properly implement break-back retries [[MountNotes|More notes]] == NFS support for IPv6 networking == * First step to getting the NFS client is getting the delegation / NLM stuff working * Port and send in RPC client stuff * Review svcauth_unix stuff to remove open-coded IPv4 address dependencies * Discuss on list whether generic address support (rather than only IPv4/6 support) is desired in the RPC server * Track where we are with user-space tools and libraries * Existing NFS IPv6 code for the client == Rebuild the NFS server and client XDR layer from the ground up == * More complete type checking and error reporting * Each function called with a simplified virtual API * All functions re-entrant so we can remove the BKL == Eliminate BKL from NFS client == * Remove BKL dependency from attribute cache * Remove BKL usage from XDR layer * Remove BKL usage from RPC client and GSS * Eliminate BKL in NFS client proper === From OmniOutliner === * Bruce found that the BKL is held while calling normal XDR encoding and decoding functions ** Why did I miss the existence BKL around XDR encoding? ** Generic xdr.c: look for anything caching an xdr_buf, especially during decode ** Still need an audit of NFSv4 XDR *** Copying state ids *** Migration - file handles can change *** Theoretically the client ID is in danger as well * Trond has RCU'd lots of stuff shared with NFSv4 XDR * and also the RPC auth cache * Radix trees are now RCU -- so write path locking might be relaxed == NFS client build testing == * Builds kernel with "allmodconfig" and "allyesconfig" * Automated - no user intervention once started * Tests all patches in a series * Later add more static analysis for each patch * Need to add post-analysis tool that compares the build logs * Need to eliminate as many spurious warnings generated by the tool chain as possible [[BuildTestNotes|More notes]] == Advanced file sync tool == * multi-purpose generic file system syncer - a file synchronization tool that runs on most Unix-flavored operating systems * one-way or bidirectional data synchronization * syncs file changes periodically or continuously * supports disconnected operation (later playback of changes) * can use advanced file system features to improve efficiency * the basic idea is to use an inotify-like mechanism to make the detection of file and directory modification more efficient [[FileSyncer|More notes]] == Unifying storage management on Linux == * A easy-to-use graphical tool that can manage storage devices and pools, and file systems * Includes a wizard (like Roxio or Toast) that can start different applications depending on what is to be accomplished * Make it easy to create, manage, and back up very large data storage pools * Make it easy to export and secure data * Provide a framework for thinking about and documenting data management [[StorageUnificationTool|More notes]] == Linux De-duplication appliance == * Provide high capacity near-line storage for inexpensive disk-based backup * Based on content-addressable storage on top of RAID 6 * Looks like one or more very large OSD LUNs or a very large NFS server [[LinuxDeDupNotes|More notes]] == NFS client performance tools == * Replace jiffies-based timestamps with ktime in the RPC client for more precise latency measurement * Consider adding existing Python utilities to nfs-utils * Update vmstat and iostat tools to provide statistics about NFS mount points * Construct new tools that provide fine-grained data about NFS mount points == Learn more about Object Storage Devices ==

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