.gitignore updates.

fix dyn-maxbytes tests

tests were handling undef values magically... thankfully they still pass after
fixing the inputs.

fix zero hash items eviction

If all hash values of five tail items are zero on the specified slab
class, expire check is unintentionally skipped and items stay without
being evicted. Consequently, n

fix zero hash items eviction

If all hash values of five tail items are zero on the specified slab
class, expire check is unintentionally skipped and items stay without
being evicted. Consequently, new item allocation consume memory space
every time an item is set, that leads to slab OOM errors.

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shuffle the EXPERIMENTAL tag.

document slab_reassign_chunk_rescues

fix test RAM bloat and more 32bit offsets.

when doing tests with long strings the results are buffered... so doing
thousands of tests with long strings was using more than a gig of ram. now we
just

fix test RAM bloat and more 32bit offsets.

when doing tests with long strings the results are buffered... so doing
thousands of tests with long strings was using more than a gig of ram. now we
just summarize if any were different.

also fixes more offset stuff.

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update item_size_max tests

more rules around item sizes now. slab chunks automatically adjust if
requesting memory > 1M

slabs reassigns works with chunks and chunked items.

also fixes the new LRU algorithm to balance by total bytes used rather than
total chunks used, since total chunks used isn't tracked for multi-ch

slabs reassigns works with chunks and chunked items.

also fixes the new LRU algorithm to balance by total bytes used rather than
total chunks used, since total chunks used isn't tracked for multi-chunk
items.

also fixes a bug where the lru limit wasn't being utilized for HOT_LRU

also some cleanup from previous commits.

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CLRF in binprot was inverted.

now extends data in the chunk rather than overwriting the end.

chunked append/prepend now work.

This is also the only actual tests of append and prepend in the codebase :/
t/binary.t had some simple tests but no others were ever written.

protect binary sasl from chunked items.

not entirely sure how to test this or guarantee people don't set the chunk
low enough to cause problems. might circle back to add better tests.

startup options for chunked items.

has spent some time under performance testing. For larger items there's less
than 5% extra CPU usage, however the max usable CPU when using large items is
1/10th o

startup options for chunked items.

has spent some time under performance testing. For larger items there's less
than 5% extra CPU usage, however the max usable CPU when using large items is
1/10th or less before you run out of bandwidth. Mixed small/large items will
still balance out.

comments out debugging (which must be removed for release).

restores defaults and ensures only t/chunked-items.t is affected.

dyn-maxbytes and item_size_max tests still fail.

append/prepend aren't implemented, sasl needs to be guarded.

slab mover needs to be updated.

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chunked item second checkpoint

can actually fetch items now, and fixed a few bugs with storage/freeing.

added fetching for binprot.
added some basic tests.

many tests still fail for various reason

chunked item second checkpoint

can actually fetch items now, and fixed a few bugs with storage/freeing.

added fetching for binprot.
added some basic tests.

many tests still fail for various reasons, and append/prepend isn't fixed yet.

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chunked items checkpoint commit

can set and store large items via asciiprot. gets/append/prepend/binprot not
implemented yet.

make test not flaky on 32bit OS.

since slab classes don't align necessarily. should maybe use the explicit slab
sizing feature to make 32/64 bit tests more stable.

too close to the line for forcing evictions.

Update memcached.c

It's returning an error when we try to cachedump the slab 63

fix flakiness of slabs-reassign2.t test.

slabs_automove=2 is fairly dumb and should be replaced with something better.
I'm guessing a kickoff from the LRU juggler if free chunks is zero, rather
than

fix flakiness of slabs-reassign2.t test.

slabs_automove=2 is fairly dumb and should be replaced with something better.
I'm guessing a kickoff from the LRU juggler if free chunks is zero, rather
than inline in the lru_pull_tail call.

This test was checking rescues/inline evictions and other newer features of
the slab rebalancer. So now that's the central point rather than racing the
slab mover thread. Tests now seem reliable.

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Fix ancient binprot bug with OOM errors desycning

sets getting OOM's for item alloc would swallow the upload bytes in ascii
protocol but missed in binprot. Swallow is usually passed through
write_bi

Fix ancient binprot bug with OOM errors desycning

sets getting OOM's for item alloc would swallow the upload bytes in ascii
protocol but missed in binprot. Swallow is usually passed through
write_bin_error, but out_of_memory() calls write_bin_error indirectly with a
zero for swallow.

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Comment the systemd service

systemd hardening

memcached should be isolated and restricted as much as possible to improve security so that if memcached is compromised, the damage will be limited.

make watcher.t be even less flaky.

don't fail on systems without 64bit atomics

We only explicitly tested for short atomics. Then I added 8byte atomic usage
in the logger: now separately test for those.. since some systems can have on

don't fail on systems without 64bit atomics

We only explicitly tested for short atomics. Then I added 8byte atomic usage
in the logger: now separately test for those.. since some systems can have one
but not the other, I'd rather use atomics where available then fall back to
a mutex when necessary.

Reproduced this on a raspberry pi 2.

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split up logger_thread_parse_entry

now a main function + helpers, with a separate write function.

drives me a lot less crazy now.

first refactor of logger_thread_parse_entry

Was in a working state for release, now doing some work to clean up the
routine. Is much shorter and clearer now. Function needs to be split into
several

first refactor of logger_thread_parse_entry

Was in a working state for release, now doing some work to clean up the
routine. Is much shorter and clearer now. Function needs to be split into
several functions from here.

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