> Hello,
> Is there any limitation about size when using raw device with ATS
> 4.1.2 ?
> I am trying to use FreeBSD 10 with an upto 8TB (single or multiple)
> raw device volume (underlying is hardware RAID 5).
> Best regards,
> Denis

I've noticed that each device used might not exceed around 200 millions of 
direntries whatever the value of proxy.config.cache.min_average_object_size.
In the system I am configuring, it works with 3 partitions of 2TB each and 
proxy.config.cache.min_average_object_size INT 12000, "http_stat" tells 
direntries.total=548862528.
Dividing partition size by min_average_object_size gives approximately 183 
millions of entries, so 3 partitions for less than 549 millions of direntries, 
it seems to be that, what do you think of it ?

With proxy.config.cache.min_average_object_size INT 12000, if I give 2 
partitions of 4TB each it doesn't work, here is the most revelant diag "cache 
disk operation failed WRITE -1 22"

Regards,
Denis
------------------------------------------------------

==> manager.log <==
[Jun 23 17:48:59.432] Server {0x804006400} NOTE: traffic server running
[Jun 23 17:48:59.433] Server {0x804008400} WARNING: disk header different for 
disk /dev/da0p7: clearing the disk
[Jun 23 17:48:59.433] Server {0x804009000} WARNING: disk header different for 
disk /dev/da0p8: clearing the disk

==> traffic.out <==
[Jun 23 17:48:59.433] Server {0x80400a400} DEBUG: (cache_hosting) Volume: 1 
Size: 8388352
[Jun 23 17:48:59.433] Server {0x80400a400} DEBUG: (cache_init) volume 1
[Jun 23 17:48:59.433] Server {0x80400a400} DEBUG: (cache_init) volume 
successfully filled from forced disks: volume_number=1
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_hosting) Disk: 0: Vol 
Blocks: 1: Free space: 0
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_hosting)       Vol: 1 
Size: 536870813
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_hosting)       Block 
No: 1 Size: 536870813 Free: 0
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_hosting) Disk: 1: Vol 
Blocks: 1: Free space: 0
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_hosting)       Vol: 1 
Size: 536870813
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_hosting)       Block 
No: 1 Size: 536870813 Free: 0
[Jun 23 17:48:59.434] Server {0x80400a400} DEBUG: (cache_init) Cache::open - 
proxy.config.cache.min_average_object_size = 12000
[Jun 23 17:48:59.436] Server {0x80400a400} DEBUG: (cache_init) allocating 
3659112448 directory bytes for a 4398045700096 byte volume (0.083199%)

==> manager.log <==
[Jun 23 17:48:59.436] Server {0x80400a400} NOTE: clearing cache directory 
'/dev/da0p7 802816:536870813'
[Jun 23 17:49:02.869] Server {0x80400d400} WARNING: cache disk operation failed 
WRITE -1 22
[Jun 23 17:49:02.869] Server {0x804006400} WARNING: unable to clear cache 
directory '/dev/da0p7 802816:536870813'

==> traffic.out <==
[Jun 23 17:49:02.872] Server {0x80400a400} DEBUG: (cache_init) allocating 
3659112448 directory bytes for a 4398045700096 byte volume (0.083199%)

==> manager.log <==
[Jun 23 17:49:02.872] Server {0x80400a400} NOTE: clearing cache directory 
'/dev/da0p8 802816:536870813'
[Jun 23 17:49:06.367] Server {0x804010400} WARNING: cache disk operation failed 
WRITE -1 22
[Jun 23 17:49:06.368] Server {0x80400ac00} WARNING: unable to clear cache 
directory '/dev/da0p8 802816:536870813'

==> traffic.out <==
[Jun 23 17:49:06.368] Server {0x80400b000} DEBUG: (cache_init) 
CacheProcessor::cacheInitialized - theCache, total_size = 1073741626 = 8388606 
MB
[Jun 23 17:49:06.368] Server {0x80400b000} DEBUG: (cache_init) 
CacheProcessor::cacheInitialized - failed to initialize the cache for http: 
cache disabled

==> manager.log <==
[Jun 23 17:49:06.368] Server {0x80400b000} WARNING: failed to initialize the 
cache for http: cache disabled
[Jun 23 17:49:06.368] Server {0x80400b000} NOTE: cache disabled

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