ASDF: An Autonomous and Scalable Distributed File System . many of the same goals as previous distributed file systems such as scalability. Distributed File System (DFS) could be a set of consumer and server .. Huang and Huan-Ming Liang, “ASDF: An Autonomous and Scalable Distributed. File. 3 / Abstract. We have simulated SimpleFS, a simple and scalable distributed file system for nowadays highly Other file systems, like TidyFS, ASDF, Ceph, etc, utilize similar concepts but take more .. ASDF: An Autonomous and. Scalable.
|Published (Last):||11 April 2004|
|PDF File Size:||10.58 Mb|
|ePub File Size:||14.62 Mb|
|Price:||Free* [*Free Regsitration Required]|
ASDF: An Autonomous and Scalable Distributed File System
Considering the massive changes, I decided it should be called ASDF 3, even though a few months ago, I was convinced I would never write such a thing, since ASDF 2 was quite stable and I had no interest in making big changes. The only encoding supported out of the box is: DBG keyword for a debugging macro met the same opposition.
In the end, there was little demand for bug fixes, and supply followed by not being active fixing bugs. Showing of 5 extracted citations. For idempotence, the package itself must be the first in the list. The solution was again suggested by POIU. Trying to homestead the: Other functions that receive nil where pathname information is required tend to return xcalable instead of signaling asff error. Note that for full support of readtable modification, other tools beside ASDF will have to be updated too: After Gary King resigned in November autonomosu, we took over his position, and produced a new version ASDF 2, released in Maythat turned ASDF from a successful experiment to a product, making it upgradable, portable, configurable, robust, performant and usable.
You may have to add: Before it may be used, a logical pathname host must be registered, with code such as follows: Failed Attempts at Improvement ; and the bug that required rewriting it all over again in Appendix F: Several related systems may fiile developed together in the same source code project.
Chronologically, however, we consciously started this porting process in interaction with developing ASDF 3, thus ensuring ASDF 3 had all the extension hooks required to avoid redefinitions. Published by Evan French Modified over 2 years ago. This was fixed by having ASDF compile into a temporary file, and move the outputs to their destination only in case of success, atomically where supported by implementation and OS.
In the s, a portable free software reimplementation, mk-defsystembecame somewhat popular.
dblp: Chi-Chang Huang
Thus, ASDF can now express arbitrary action graphs, and could conceivably be used in the future to build more than just CL programs.
Due to the many features regarding pathnames, not all strings validly parse to a pathname, and not all pathnames have a valid representation as a namestring. Usability was an important concern while developing ASDF 2.
Starting with ASDF 3. Until there exists some configuration system that allows developers to run all these checks on new code without having them break old code, the feature will have to remain disabled by default.
This can ans a lot of confusion and pain. ASDF should have been propagating timestamps, not just force flags for whether recompilation was needed in the current session!
1 Ceph Distributed Storage Sage Weil DreamHost / new dream network April 7, 2011.
By contrast, the CLOS protocol was cleverly designed so that users do not usually call the functions on which they define methods such as initialize-instanceor update-instance-for-redefined-classand do not usually define methods on the functions they call.
Starting with ASDF 2, things became much simpler: For instance, the commented traverse-action function is 43 lines long, which is still significantly less than the original traverse function. Peer-to-peer Autonomy Multi-source Source data Service-oriented device architecture. In latter variants of ASDF 1, the above static-file example would work, with an elaborate system to extract the type; however, the former example would now fail subtly, with the type “bar” ending up overridden by the type “lisp” from the class.
It also provides a function ensure-directory-pathname to try to add the equivalent trailing slash after the fact when it was previously omitted. Importantly for a build system, there are portable abstractions for compiling CL files while controlling all the warnings and errors that can occur, and there is support for the tile of a Lisp image: Despite the feature demonstrably not ever having had any single user, it had been partially documented, and so was finally fixed and enabled in ASDF 2.
Meanwhile this ssystem had also become more important, since ASDF had grown so much, having almost tripled in size since those days, and was promising to grow some more. To bring some principle to this division 2.
学术圈 – Reclaiming Space from Duplicate Files in a Serverless Distributed File System
Outline Introduction Load balancing Clustering. Or you might desire the technical support or additional libraries from a proprietary implementation. All the cloud computing processes need to be in unanimity to dole out better QoS i. The principle of visiting the action graph multiple times is generalizable to other situations, and the maximum number of visits of a given node is the height of the semi-lattice of node states during the traversal.
In many ways, this provides a convenient abstraction, that smoothes out the discrepancies between implementations and between operating systems. In the last days of ASDF 1, there was an attempt to export its small set of general purpose utilities as package asdf-extensionsquickly renamed asdf-utilities before the release of ASDF 2, to avoid a misnomer.
ASDF 2 thus started growing an abstraction layer that works around bugs in each implementation and smoothes out incompatibilities, which made the ASDF code itself larger, but allowed user code to be smaller for portable results.