Feature #15501


Squid COSS filesystem

Added by Jonathan Lee 29 days ago. Updated 20 days ago.

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Hello Coss is missing from the new Squid package it is not listed as an option. This should work great with Squid 6.6.


Actions #1

Updated by Jonathan Lee 29 days ago

“The Cyclic Object Storage Scheme (costs) is an attempt to develop a custom file system for Squid.”

Ref: squid the definite guide Duane Wessels

Actions #2

Updated by Jonathan Lee 28 days ago

Correction: per developer response

“Squid does not support COSS cache_dirs since v3.5. If Squid in question does disk caching, then rock cache_dirs may be the best bet.


Rock is not listed

====  The rock store type  ====
cache_dir rock Directory-Name Mbytes [options]
The Rock Store type is a database-style storage. All cached
entries are stored in a "database" file, using fixed-size slots.
A single entry occupies one or more slots.
If possible, Squid using Rock Store creates a dedicated kid
process called "disker" to avoid blocking Squid worker(s) on disk
I/O. One disker kid is created for each rock cache_dir. Diskers
are created only when Squid, running in daemon mode, has support
for the IpcIo disk I/O module.
swap-timeout=msec: Squid will not start writing a miss to or
reading a hit from disk if it estimates that the swap operation
will take more than the specified number of milliseconds. By
default and when set to zero, disables the disk I/O time limit
enforcement. Ignored when using blocking I/O module because
blocking synchronous I/O does not allow Squid to estimate the
expected swap wait time.
max-swap-rate=swaps/sec: Artificially limits disk access using
the specified I/O rate limit. Swap out requests that
would cause the average I/O rate to exceed the limit are
delayed. Individual swap in requests (i.e., hits or reads) are
not delayed, but they do contribute to measured swap rate and
since they are placed in the same FIFO queue as swap out
requests, they may wait longer if max-swap-rate is smaller.
This is necessary on file systems that buffer "too
many" writes and then start blocking Squid and other processes
while committing those writes to disk. Usually used together
with swap-timeout to avoid excessive delays and queue overflows
when disk demand exceeds available disk "bandwidth". By default
and when set to zero, disables the disk I/O rate limit
enforcement. Currently supported by IpcIo module only.
slot-size=bytes: The size of a database "record" used for
storing cached responses. A cached response occupies at least
one slot and all database I/O is done using individual slots so
increasing this parameter leads to more disk space waste while
decreasing it leads to more disk I/O overheads. Should be a
multiple of your operating system I/O page size. Defaults to
16KBytes. A housekeeping header is stored with each slot and
smaller slot-sizes will be rejected. The header is smaller than
100 bytes.
no-store    no new objects should be stored to this cache_dir.
min-size=n    the minimum object size in bytes this cache_dir
will accept. It's used to restrict a cache_dir
to only store large objects (e.g. AUFS) while
other stores are optimized for smaller objects
(e.g. Rock).
Defaults to 0.
max-size=n    the maximum object size in bytes this cache_dir
The value in maximum_object_size directive sets
the default unless more specific details are
available (ie a small store capacity).
Note: To make optimal use of the max-size limits you should order
the cache_dir lines with the smallest max-size value first.



Actions #3

Updated by Kris Phillips 20 days ago

  • Status changed from New to Rejected

Squid is deprecated in pfSense, so any fixes or feature adds are unlikely to occur.

Marking redmine as Rejected.


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