tanruixiang commented on PR #882:
URL:
https://github.com/apache/incubator-kvrocks/pull/882#issuecomment-1250314669
> @PragmaTwice @git-hulk @torwig I noticed a problem. In the following
tests. When we write a value with only one bit(like 'a'). Occasionally, the
size of the key we get is 0. It occurs frequently when the value is very small.
I guess the reason for this problem is that sync in writeoption defaults to
false. Or because the `GetApproximateSizes` can only yield approximate values,
which may be ignored for small values.
>
> ```
> std::vector<int> value_size{1, 1024};
> for(auto &p : value_size){
> EXPECT_TRUE(string->Set(key_, std::string(p, 'a')).ok());
> std::string got_value;
> EXPECT_TRUE(string->Get(key_, &got_value).ok());
> EXPECT_EQ(got_value, std::string(p, 'a'));
> std::string value;
> string->Get(key_, &value);
> uint64_t result = 0;
> EXPECT_TRUE(disk->GetKeySize(key_, kRedisString, &result).ok());
> EXPECT_GE(result, p);
> }
> ```
@git-hulk Hi. Do you have time to look at this question? Because the
approximate usage space is obtained, it may encounter a situation of 0 during
testing. Increasing the sleep time also doesn't completely solve the problem.
It seems that the sync method is not supported either.
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