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in this case, 56bit should be enough.

在 2012年4月12日 上午1:34,云风 <cloudwu@gmail.com> 写道:
> We use int64 for a timestamp from outside ( read from a socket with
> the protocol) , and we need preform arithmetic on it.
>
> 在 2012年4月11日 下午9:14,Xavier Wang <weasley.wx@gmail.com> 写道:
>> and then you can put it into a string.
>>
>> 在 2012-4-11 晚上8:05,"steve donovan" <steve.j.donovan@gmail.com>写道:
>>
>>> On Wed, Apr 11, 2012 at 1:42 PM, Alex Queiroz <asandroq@gmail.com> wrote:
>>> > Unless it's possible to create the IDs consecutively starting from 1.
>>>
>>> But they often come from outside, and Outside has its own logic ;)
>>>
>>> steve d.
>>>
>>
>
>
>
> --
> http://blog.codingnow.com
>