Re[2]: [PATCH v2 2/5] test: errinj for pause relay_send

[Sergei Voronezhskii]

>Воскресенье, 21 октября 2018, 23:41 +03:00 от Alexander Turenko <alexander.turenko at tarantool.org>:
>
>Hi!
>
>I don't have objections in general. Some minor comments are below.
>
>Please, answer with fixes, don't just send the whole patch.
>
>WBR, Alexander Turenko.
>
>> Instead of using timeout we need just pause `relay_send`. Can't rely
>> on timeout because of various system load in parallel mode. Add new
>> errinj which checks boolean in loop and until it is not `True` do not
>> pass the method `relay_send` to the next statement.
>> 
>> To check the read-only mode, need to make a modification of tuple. It
>> is enough to call `replace` method. Instead of `delete` and then
>> useless verification that we have not delete space by using `get`
>> method.
>> 
>
>delete space -> delete tuple? 
fixed
>
>
>> +-- In the next two cases we try to replace a tuple while replica
>> +-- is catching up with the master (local delete, remote delete)
>
>delete -> replace
fixed
>
>> +-- case
>
>Nit: period at the end. 
fixed
>
>
>> --- check sync
>> -errinj.set("ERRINJ_RELAY_TIMEOUT", 0)
>> +-- Resume replicaton.
>
>replicaton -> replication
fixed
>
>> diff --git a/test/replication/gc.test.lua b/test/replication/gc.test.lua
>> index 5100378b3..22921289d 100644
>> --- a/test/replication/gc.test.lua
>> +++ b/test/replication/gc.test.lua
>> @@ -12,6 +12,7 @@ default_checkpoint_count = box.cfg.checkpoint_count
>>  box.cfg{checkpoint_count = 1}
>> 
>>  function wait_gc(n) while #box.info.gc().checkpoints > n do fiber.sleep(0.01) end end
>> +function wait_xlog(n, timeout) timeout = timeout or 1.0 return test_run:wait_cond(function() return #fio.glob('./master/*.xlog') == n end, timeout) end
>>
>
>Use 'set delimiter' and write it in several lines. Also, below I
>proposed to support 'n' being a table to allow count of files being one
>of several values. You can use auxiliary function like the following and
>type(n) == 'table' check.
>
>function value_in(val, arr)
>    for _, elem in ipairs(arr) do
>        if val == elem then
>            return true
>        end
>    end
>    return false
>end
fixed
>
>> @@ -31,7 +32,7 @@ for i = 1, 100 do s:auto_increment{} end
>> 
>>  -- Make sure replica join will take long enough for us to
>>  -- invoke garbage collection.
>> -box.error.injection.set("ERRINJ_RELAY_TIMEOUT", 0.05)
>> +box.error.injection.set("ERRINJ_RELAY_SEND_DELAY", true)
>> 
>>  -- While the replica is receiving the initial data set,
>>  -- make a snapshot and invoke garbage collection, then
>> @@ -41,7 +42,7 @@ test_run:cmd("setopt delimiter ';'")
>>  fiber.create(function()
>>      fiber.sleep(0.1)
>>      box.snapshot()
>> -    box.error.injection.set("ERRINJ_RELAY_TIMEOUT", 0)
>> +    box.error.injection.set("ERRINJ_RELAY_SEND_DELAY", false)
>>  end)
>>  test_run:cmd("setopt delimiter ''");
>> 
>
>The entire comment:
>
>> -- While the replica is receiving the initial data set,
>> -- make a snapshot and invoke garbage collection, then
>> -- remove the timeout injection so that we don't have to
>> -- wait too long for the replica to start.
>
>Proposed: then remove delay to allow replica to start.
fixed
>
>> --- Remove the timeout injection so that the replica catches
>> +-- Resume replicaton so that the replica catches
>
>replicaton -> replication
fixed
>
>> @@ -146,17 +147,16 @@ box.snapshot()
>>  _ = s:auto_increment{}
>>  box.snapshot()
>>  #box.info.gc().checkpoints == 1 or box.info.gc()
>> -xlog_count = #fio.glob('./master/*.xlog')
>>  -- the replica may have managed to download all data
>>  -- from xlog #1 before it was stopped, in which case
>>  -- it's OK to collect xlog #1
>> -xlog_count == 3 or xlog_count == 2 or fio.listdir('./master')
>> +wait_xlog(3, 0.1) or wait_xlog(2, 0.1) or fio.listdir('./master')
>
>You are set timeout to 1.0 for other cases, but 0.2 here. So, 0.2 is
>enough? It is better to allow the function to accept a table like {2, 3}
>as files count. Use 'set delimiter' and update the function.
fixed

-- 
Sergei Voronezhskii
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