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The Design and Implementation of a Log-structured File System (1992)
| Content Provider | CiteSeerX |
|---|---|
| Author | Rosenblum, Mendel Ousterhout, John K. |
| Abstract | This paper presents a new technique for disk storage management called a log-structured jile system. A logstructured file system writes all modifications to disk sequentially in a log-like structure, thereby speeding up both file writing and crash recovery. The log is the only structure on disk, it contains indexing information so that files can be read back from the log efficiently. In order to maintain large free areas on disk for fast writing, we divide the log into segments and use a segment cleaner to compress the live information from heavily fragmented segments. We present a series of simulations that demonstrate the efficiency of a simple cleaning policy based on cost and benefit. We have implemented a prototype logstructured file system called Sprite LFS; it outperforms current Unix file systems by an order of magnitude for small-file writes while matching or exceeding Unix performance for reads and large writes. Even when the overhead for cleaning is included, Sprite LFS can use 70 % of the disk bandwidth for writing, whems Unix file systems typically can use only 5-10%. 1. |
| File Format | |
| Journal | ACM Transactions on Computer Systems |
| Publisher Date | 1992-01-01 |
| Access Restriction | Open |
| Subject Keyword | Log-structured File System Sprite Lf Unix Performance Crash Recovery Large Free Area Log-like Structure Disk Bandwidth Unix File System Segment Cleaner Log-structured Jile System Large Writes File System Current Unix File System Live Information Disk Storage Management New Technique Fast Writing File Writing Small-file Writes Simple Cleaning Policy |
| Content Type | Text |
| Resource Type | Article |
