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[COPY] --- SDE-COPYRIGHT-NOTE-BEGIN ---[COPY] This copyright note is auto-generated by ./scripts/Create-CopyPatch.[COPY][COPY] Filename: package/.../unscd/unscd.desc[COPY] Copyright (C) 2008 The OpenSDE Project[COPY][COPY] More information can be found in the files COPYING and README.[COPY][COPY] This program is free software; you can redistribute it and/or modify[COPY] it under the terms of the GNU General Public License as published by[COPY] the Free Software Foundation; version 2 of the License. A copy of the[COPY] GNU General Public License can be found in the file COPYING.[COPY] --- SDE-COPYRIGHT-NOTE-END ---
[I] A reliable replacement for Glibc's nscd
[T] Nscd is a daemon that provides a cache for the most common name service[T] requests.[T][T] As designed, nscd is a multithreaded program which calls NSS libraries.[T] These libraries are not part of libc, they may be provided[T] by third-party projects (samba, ldap, you name it).[T] Thus nscd cannot be sure that libraries it calls do not have memory[T] or file descriptor leaks and other bugs.[T][T] Since nscd is multithreaded program with single shared cache,[T] any resource leak in any NSS library has cumulative effect.[T] Even if an NSS library leaks a file descriptor 0.01% of the time,[T] this will make nscd crash or hang after some time.[T][T] Of course bugs in NSS .so modules should be fixed, but meanwhile[T] we do want nscd which does not crash or lock up.[T][T] unscd is a single-threaded server process which offloads all NSS[T] lookups to worker children (not threads, but fully independent[T] processes). Cache hits are handled by parent. Only cache misses[T] start worker children. This design is immune against resource leaks[T] and hangs in NSS libraries. It is also many times smaller and it[T] emulates glibc nscd pretty closely.
[U] http://busybox.net/~vda/unscd
[A] Denys Vlasenko <vda@busybox.net>[M] Alejandro Mery <amery@opensde.org>
[C] extra/tool
[L] GPL[S] Stable[V] 0.33[P] X -----5---9 800.000
[D] 1227523892 nscd-0.33.c http://busybox.net/~vda/unscd/
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