--cache_size is not documentated on website? Paul Alfille escreveu: > Done! > > --cache_size=1000000 from the command line (or configuration file). > default is cache_size=0 which means no limit > > The limit is a little squishy, no more items can be added once the > cache is exceeded. > > Some permanent items, like barometer parameters don't cound against > the cache (but should be small). > > The cache limit doesn't propogate, you can have > > owserver --cache_size=9999 > owfs --cache_size=1000 --autoserver > > and owfs might overflow while owserver ca nstill accept items. > > Note that the cache degrades cleanly. Once the size is exceeded, the > program will continue to function, just not add items to the cache. > > Paul Alfille > > On 10/16/06, *Roberto Spadim* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > can we set max cache size? like 1mb of cache? > > Roberto Spadim escreveu: > >today implementation don't have problems! > > > >maybe an new directory could help, see: > > > >when we get from "/#OW SYSTEM#/#ANY FILE OR DIRECTORY#" (could be > >"/ow_device_manager/#ANY FILE OR DIRECTORY#") > >OW SYSTEM: > > ow system that's connected direct to ds2480 or ds2490 or another > >dsxxxx > > > >this directory could work like this: > > > >init(" owserver "); > >get(" settings values "); > >put("/settings/timeout/network",0); > >put("/settings/timeout/stable",0); > >put("/settings/timeout/volatile",0); > >put("/settings/timeout/ another timeout configurations ",0); > >$value=get(" getting now will be expired cache value, we will get > from > >owserver :) "); > >put(" set settings back again ",setting_value); > >echo "$value"; > > > >i can do it with php, but time to change and set again > configuration is > >very big for a single read. > > > >***************** > >cache system ideas: > > > >SQLITE > >sqlite good things: > >we can SEE the cache > > > >good thinks about sqlite library (www.sqlite.org > <http://www.sqlite.org>): > >Small code footprint: less than 250KiB fully configured or less > than 150KiB > >with optional features omitted. > >Supports databases up to 2 terabytes (241 bytes) in size. (no > problem with > >264 device) > >A complete database is stored in a single disk file. > >Implements most of SQL92. > >Zero-configuration - no setup or administration needed. > >Self-contained: *no external* dependencies. > > > > > >*have windows and posix support!!!!* > > > >SQLITE PROBLEMS: > > maybe anyone could delete file or change table values or put > incorrect > >values on cache system, write lock on file must be done > > if sqlite is used with ":memory:" (in memory database) just > owserver > >will see the database, may be it could be used only with > filesystem cache > > > >if sqlite is faster than today implementation AND with small > footprint, we > >could change today implementation for non uclinux compilations > too, we need > >to see if memory usage is bigger or small with sqlite library too > > > >we don't need to delete expirate values, a field could say the > last time > >that cache was updated and an SQL statment could filter the value > like: > >"SELECT value FROM cache_table WHERE file='balbalbal' AND > expiration_time>= > >current_time ", maybe when owserver end or start database could be > >cleaned... > > > > > >ANOTHERS > > > >anothers cache systems could be: the system used in MMTurck or > eaccelerator > >or APC or memcache (php libraries from pecl.php.net > <http://pecl.php.net>) or Berkeley DB or > >(http://www.danga.com/memcached/) : > >Memcached is a caching daemon designed especially for dynamic web > >applications to decrease database load by storing objects in memory. > >MEMCACHE PROBLEMS: > > server must run before ow, > > could be used for non uclinux too, > > maybe sqlite could be faster, if disk write and read is > faster than IP > >communication. > > If memcache server die or don't work what could we do? > > i didn't see documentation of memcache, but i think that we > can't see > >all cache contents like an "SELECT * FROM cache_table" > > > >COMMENTS: > > > >i don't know if database systems could help, we need fast systems > and i > >don't like another program running like mysqld or oracle daemon or > >postgrees daemon or firebird daemon or XXX daemon, maybe embbeded > solutions > >like sqlite or filebased databases could help. without server > running cache > >is locked, using filebased database we just need file access to > write and > >read, today i just run owserver with root... i don't have privileges > >problems for files, for windows the same thing just run like > administrator > >if we will use filebased, we need to remember that files can be > shared... > >if we put it on network filesystems maybe many owserver can use the > >samefile and table conflicts could occur like duplicated settings > values, > >we need to put mac address to know what server we are, or another > unique > >ID... > >just building to test and know if it really work... > > > > > >Paul Alfille escreveu: > > > >>Hi Robero. You certainly are exploring the entire program! > >> > >>Currently the cache is an in-memory binary tree. There is some > information > >>at http://www.owfs.org/index.php?page=cache > >><http://www.owfs.org/index.php?page=cache > > >> > >>Several different things are cached: > >>1. devices (basically if a serial number was found, and on which > bus) > >>2. directory lists (lists of serial numbers for a given path) > >>3. "file" contents ( things like serialnumber/temperature ) > >>4. Hidden properties (like cumulative counters, and barometer > calibration > >>factors) > >> > >>Cached items also store their termination time. > >> > >>We actually use two binary trees, one for new entries, and one > that is > >>older. The older one doesn't get updated, and eventually expires > entirely, > >>and gets deleted. At that point, the newer one becomes the older > one, and > >>a new one is started. > >> > >>This means that we never have to scan through all the items with > see which > >>are too old, and stale entries are guarnteed to be deleted in a > reasonable > >>time period. > >> > >>So, could the cache be stored in SQLite? Sure. Could it be > backed up by a > >>physical file? Sure. What would the advantage be? Binary trees > are quite > >>fast for adding and retrieving. Glibc and uClibc both have > support built > >>in for binary trees so external libraries are needed. > >> > >>There are some problems with the current scheme. If you have owfs > >>connecting to owserver, each has it's own cache. It is possible > for the > >>caches to be out of synch, especially if several programs are > connected to > >>owserver. Reading "uncached" values will always work, and cache > problems > >>time themselves out quickly in any case. > >> > >>An alternative design would be a separate owcache program. Cache > would be > >>consistent, and not repeated, but communication efficiency might > swamp > >>space efficiency. I didn't do it because of the complexity. > >> > >>Tell me what you see as the deficiencies of the current scheme. > >> > >>Paul Alfille > >> > >>On 10/14/06, *Roberto Spadim* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]> > >><mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>> > wrote: > >> > >> Hello guys, i was thinking about cache system... > >> can we use cache in filesystem? > >> like in sqlite we can use > >> sqlite_open(":memory:"); > >> to use database on memory and > >> sqlite_open("/file.sqlite"); > >> to open an file > >> could we set the "file_name" of cache system? > >> if we put "NULL" the cache system could be turned off > >> what you say? > >> > >> have anyother database system that is fast than today > database? > >> sqlite > >> could be used? we are using berkley? > >> could we select "file_name" for > >> Old Cache data > >> New Cache data > >> Persistent data > >> > >> in diferent "files"?? > >> thankx guys :) > >> > >> "files" could be memory or real file > >> > >> > > >>------------------------------------------------------------------------- > > >> Using Tomcat but need to do more? Need to support web services, > >> security? > >> Get stuff done quickly with pre-integrated technology to > make your > >> job easier > >> Download IBM WebSphere Application Server v.1.0.1 based on > Apache > >> Geronimo > >> > >>http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> > >> > > >><http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > > <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642>> > >> _______________________________________________ > >> Owfs-developers mailing list > >> Owfs-developers@lists.sourceforge.net > <mailto:Owfs-developers@lists.sourceforge.net> > >> <mailto:Owfs-developers@lists.sourceforge.net > <mailto:Owfs-developers@lists.sourceforge.net>> > >> > https://lists.sourceforge.net/lists/listinfo/owfs-developers > <https://lists.sourceforge.net/lists/listinfo/owfs-developers> > >> > >> > >>------------------------------------------------------------------------ > >>Esta mensagem foi verificada pelo E-mail Protegido Terra > >>< http://mail.terra.com.br/>. > >>Scan engine: McAfee VirusScan / Atualizado em 13/10/2006 / Versão: > >>4.4.00/4873 > >>Proteja o seu e-mail Terra: http://mail.terra.com.br/ > <http://mail.terra.com.br/> > >>------------------------------------------------------------------------ > >> > > >>------------------------------------------------------------------------- > >>Using Tomcat but need to do more? Need to support web services, > security? > >>Get stuff done quickly with pre-integrated technology to make > your job > >>easier > >>Download IBM WebSphere Application Server v.1.0.1 based on > Apache Geronimo > >> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> > >>------------------------------------------------------------------------ > >> > >>_______________________________________________ > >>Owfs-developers mailing list > >>Owfs-developers@lists.sourceforge.net > <mailto:Owfs-developers@lists.sourceforge.net> > >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > >> > > > > > >------------------------------------------------------------------------- > >Using Tomcat but need to do more? Need to support web services, > security? > >Get stuff done quickly with pre-integrated technology to make > your job > >easier > >Download IBM WebSphere Application Server v.1.0.1 based on Apache > Geronimo > > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> > >_______________________________________________ > >Owfs-developers mailing list > > Owfs-developers@lists.sourceforge.net > <mailto:Owfs-developers@lists.sourceforge.net> > >https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > >Esta mensagem foi verificada pelo E-mail Protegido Terra. > >Scan engine: McAfee VirusScan / Atualizado em 13/10/2006 / Versão: > >4.4.00/4873 > >Proteja o seu e-mail Terra: http://mail.terra.com.br/ > > > > > > > > > > _________________________________________________________________ > Inscreva-se no novo Windows Live Mail beta e seja um dos primeiros > a testar > as novidades-grátis. Saiba mais: > > http://www.ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, > security? > Get stuff done quickly with pre-integrated technology to make your > job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache > Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > <mailto:Owfs-developers@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > ------------------------------------------------------------------------ > Esta mensagem foi verificada pelo E-mail Protegido Terra > <http://mail.terra.com.br/>. > Scan engine: McAfee VirusScan / Atualizado em 16/10/2006 / Versão: > 4.4.00/4874 > Proteja o seu e-mail Terra: http://mail.terra.com.br/ > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > ------------------------------------------------------------------------ > > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers >
------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
