Smart Cache Manual
Chapter 15 - What's new

0.84 3.3.2003 There are 11 people subscribed to mailing list. This release fixes many 304 reply handling bugs, some very old.

News

• Update ETag info on 304 reply if possible.

• Allow client side persistent connection alive after 304 reply.

• Do not update Expires: info on 304 reply, if not sent by server.

• Generate our headers on 304 reply instead of using headers from server.

• Fix bad headers on 304 reply from Microsoft IIS servers.

• -fastrefresh sets Max-Age: to 1 day.

• UI: added some missing titles.

• UI: Smart Cache Loader screen has bgcolor.

• Show URL on generated errors.

• GC: do not apply multiple modifiers to object when checking for penalty.

• More intelligent check for writeable filesystem.

• New manual section Administration of large cache, Section 9.3.

0.83 16.2.2003 Turbo version. I have created mailing list for scache, you can read more information here. Come and joins us!

News

• Support for keep-alive connections on input side. This makes sending cached data to browser 100% faster. Offline browsing goes turbo.

• trace_input_keepalive switch

• TCP nagle alg. is disabled as says wise men on w3c.

• improved log synchronisation on log files.

• max_aborted_transfer_time is now floating point number.

• reference_age is now floating point number.

• send reset on full cache.

• File/directory clash is now handled correctly when exporting data.

• Manual updates. New sections: for admins, for hackers.

• New manual section Choosing a good cachesize, Section 7.1

0.82.1 Bugfix for customers only

News

• Fixed NPE crash on unknown hostname.

• GC: no infinite loops on lopsizeinc=0 or sopsizedec=0

• GC: null modificators (i.e. +0 *1 -0) are detected and ignored.

• UI: offline support buttons are now switchable

0.82 9.2.2003

News

• Support for HTTP/1.1 persistent connections on output side. Browsing performance increased! Some code taken from BSD copyrighted Rabbit2 proxy server. Many thanks to Robert Olofsson. )

• values liked 1d can be used in refresh patterns and export times with decimal fraction part.

• print notice when refresh pattern gets ignored.

• trace_keepalive config keyword + UI options for tracing keep alive connections.

• new option keepalivetimeout for enabling them.

• https now works even if http_proxy is defined but https_proxy is not.

• Console loglevel can be changed in UI.

• remove end file separator from target directory when exporting.

• fixed old bug from 0.54 version, which causes that incorrect directory structure was created by export function.

• gcloglevel configuration option for making reports from garbage collection less verbose.

• Example scache.cnf has a nice table inside - choosing directory swaplevels for cachesize.

• Minor improvment in GC stats reporting.

• Test for using root directory as cacheroot somewhat improved. Protect Windows users from doing something stupid.

• download_machine_ctype_ignore Turns off ctype dmachine hook for specific URLs.

• Manual updated

• somewhat reduced memory requirements during GC.

• -fakegc do not deletes files on = gc rule.

• GC: objects with Etag: header ARE checkable

• GC: new redirect_penalty option in gc.cnf

• UI: loglevel can be changed.

0.81 2.2.2003

News

• UI: added flush logs command.

• combined log file has missing " after user agent. (Klaus Schirmanns)

0.80.1 23.1.2003

News

• UI: fixed crash when search depth is not a number.

• combined log file do not have doubles \n (Klaus Schirmanns)

0.80 6.1.2003

News

• UI: directory depth after search is set to last depth used.

• fixed NPE crash on BAD method.

• fixed cleandir to work correctly in Linux and Windows. Worked ok only on OS/2

• Try to rename files when there is directory/filename conflict.

• search cache feature, config keyword ui_searchcachefactor. This makes searches on large caches more useable.

• New manual section Configurating refresh patterns, Section 7.2

• 410 is also httprc for page deletion.

• Cache also 414, like Squid.

• Debian packages are also distributed.

• GC summary report contains also median time mark.

0.79 28.11.2002

News

• building native gcj version do not require jdk

• first rule in fail/pass was matched insensitive

• fail/pass not working (bug from .78)

• Smart Cache now sends Content-length: 0, where needed

• new config keyword listenbacklog, defaults to 511

• default number of clients increased from 25 to 30

0.78 25.11.2002

News

• GC: do not allow average dirsize < blocksize

• report correct count of unlinked directories (updirs included)

• GC: deleted directories during GC delete pass are now correctly counted

• Delta display supports Months, Years.

• Trace on/off configurable in UI

• New configuration keyword loglevel

• Speed ups by reverse regsearch on fail/pass

• on conflicting filenames, use random numbers, not loop over long list of possible list of existing filenames. Really big performance improvment for directory with about 1000 files with conflicting filename (i.e. Google).

• look for etag and return 304 if exists and connection failed.

• force_ims_on_reloads when doing forced refresh do not add IMS header.

• Fixed some syntax errors for making gcj happy.

• Debian: smartcache as gcj-native can be build from sources. Works great and fast.

• New manual section: Proxy cache Benchmarks, Section 9.2

• trace_url shows also request protocol

• trace_refresh shows expire date when not reached

0.77 14.11.2002

You need to change maximum_object_size in gc.cnf to bytes.

News

• GC: average_directory_size do not includes size of .cacheinfo now. .cacheinfo files are sized using blocksize alg. as all other files.

• GC: minimum_object_size (idea from Squid)

• GC: maximum_object_size is now in bytes, not KB as before

• GC: small_object_penalty syntax extended and changed to be like LOP

• GC: cache size is now computed more correctly nearly 100% exact. Only one case is not handled and can not be: some filesystem /ext2/ preallocates blocks for files.

• GC: use long interger instead of int

• GC: improved after scan cache statistics

• agent_log, referer_log feature removed

• new common/combined log file format (features correct httprc and bytes count)

• -nolog command line switch

• auto_decompress can unpack 'deflate' encoding (used in IIS)

• Manual: new section How garbage collection works, Section 7.3

• Manual: new section Smart Cache vs Squid, Section 9.5

• Manual updated: section Choosing Java version, Section 3.2

• new defaults in DM content-type hook

• short refresh patterns are no longer allowed

• do not print to console that dirs are GC's - confuses users. There are freed.

• some hardcoded defaults was retuned

• Major update of Debian packaging. Features: debconf support, correct file and dirs perms., do not allow root to run system-wide smartcache, support for rotated log files, configuration generation.

• New command line switch -notrace

• -local switch now sets a maximum possible expire time (benchmarks results increased by 5%)

• note: increasing internal buffers from 4096 to 8192 lowers performance.

• note: slower when compiled with javac -O

• log file format chooser log_common true/false

• dmachine_offline_url_mask command gives content-type hooks priority over URL hooks

• UI: port of main server is shown

• log file buffer increased to 8K.

0.76 3.11.2002

News

• UI: Interface for Download machine

• Download machine can be hooked to content type download_machine_ctype_mask

• -ui_port runs UI on alternate port

• download_machine_mask renamed to download_machine_url_mask

• Win: VBS startup script

Bug fixes

• UI: loader also accept empty string as default loader.cnf depth

• UI: end of queue messages displayed

• UI: shows which URLs are removed from queue

• No more duplicated entrys in DM queue file

• Trace messages are now printed correctly with full URL

0.75 1.09.2002

News

• Download machine hook can now ignore some URLs. Try download_machine_ignore *sourceforge*

• UI: File date is shown instead of mime type

Bug fixes

• UI: bindaddress is shown

• UI: show loader queue is disabled when there is no loader support

• GC: protocol URL matching works, see example gc.cnf

• GC: fixed typo in gc output

0.74 1.08.2002

News

• new structure of .cacheinfo files (version 4). Now it supports ETag: header. Existing one will be converted when used.

• support for Etag and If-None-Match

• added some new methods for webdav/deltaV. Not yet working due to lack of documentation.

Bug fixes

• Do not use IMS when loading Missing objects from cache

• HEAD request no longer fails on object which is not in cache

• repair handles files with .gz extension better.

• when generating fake user agent add space after : in header

• Fix for refresh and no if-modified-since header. Browser should get object and not 304.

0.73 17.06.2002

• appending to existing via: header instead creating a new one.

• several new Smart Cache command line switches, Chapter 8

0.72 16.05.2002

Bug fixes

• cache searches are less CPU intensive

• fixed problems when auto deleting of patterns was too active on refresh_patterns

• added support for seconds in delta reporting engine

• google searches have .gz when gzipped

0.71 22.04.2002

Bug fixes

• max_clients renamed to max_connections

• UI: escaping " char.

• Fixed trace output from refresh engine when forced refresh is being ignored

• UI: do not display choices for loader if loader is not configured

• Fixed typo in regex matching

• Fixed problem with netmasks/n when n mod 8 != 0

• Fixed problem with cfgdir and regex_fail

0.70 11.04.2002

Bug fixes

• -direct switch works again (broken in .69)

• UI: Added cache-control: no-cache

• UI: removed no-cache from redirects to good ui hostname

• Changed error message: too more clients -> too more connections

• send_from_cache now handles IMS requests in the correct way (Needed for Opera5)

• Redirects to UI generates now last-modified-date in the past

• summary: Opera5 now works with redirects generated by SC.

• UI: announces URL when adding it to loader queue, saves 1 goback.

• adding proxy-connection: close to all documents flying through.

• changed startup messages: host os -> filesystem

• updated troubleshoting section

New features

• Auto - removing not needed fules from fail.cnf.

See also Older history of Changes, Chapter 16

Smart Cache Manual