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Posted to user@cassandra.apache.org by "XL.Pan" <pa...@sina.com> on 2009/12/15 06:16:39 UTC
how to transfer large data?
hi,
I want to use the Cassandra to store pictures(about 100k ~ 3M). I don't know how to write the client, because I find the value's type in the Column class is std::string.
How can I deal with this?? My key type is int and value type is raw data(about 120K). Thanks! :-)
2009-12-15
XL.Pan
Re: how to transfer large data?
Posted by "XL.Pan" <pa...@sina.com>.
sorry, it's my fault. I think the data can be constructed to a string. eg : string(buf, buf_len);
2009-12-15
Baidu STL 潘晓雷| (+86 10) 59926720| panxiaolei@baidu.com | Hi: pan_edward | F7-BE185
发件人： XL.Pan
发送时间： 2009-12-15 13:16:39
收件人： cassandra-user
抄送：
主题： how to transfer large data?
hi,
I want to use the Cassandra to store pictures(about 100k ~ 3M). I don't know how to write the client, because I find the value's type in the Column class is std::string.
How can I deal with this?? My key type is int and value type is raw data(about 120K). Thanks! :-)
2009-12-15
XL.Pan
??: how to transfer large data?
Posted by ma...@gmail.com.
As far as I know, std::string can deal with "string with unprintable char in
body", aka "binary"
#include <string>
#include <cstdio>
int main()
{
std::string test;
test.append("this");
printf("length of test is %u\n",test.length());
test.push_back('0');
test.push_back('0');
test.push_back('0');
printf("length of test is %u\n",test.length());
}
length of test is 4
length of test is 7
-----????-----
???: Jonathan Ellis [mailto:jbellis@gmail.com]
????: 2009?12?15? 21:27
???: cassandra-user@incubator.apache.org
??: Re: how to transfer large data?
really, "binary" to thrift C++ is std::string?
that doesn't make much sense to me, but I don't know C++...
On Mon, Dec 14, 2009 at 11:16 PM, XL.Pan <pa...@sina.com> wrote:
> hi,
> I want to use the Cassandra to store pictures(about 100k ~ 3M). I don't
know
> how to write the client, because I find the value's type in the Column
class
> is std::string.
> How can I deal with this?? My key type is int and value type is raw
> data(about 120K). Thanks! :-)
>
> 2009-12-15
> ________________________________
> XL.Pan
RE: how to transfer large data?
Posted by ma...@gmail.com.
As far as I know, std::string can deal with "string with unprintable char in
body", aka "binary"
#include <string>
#include <cstdio>
int main()
{
std::string test;
test.append("this");
printf("length of test is %u\n",test.length());
test.push_back('0');
test.push_back('0');
test.push_back('0');
printf("length of test is %u\n",test.length());
}
[root@xxxxx tmp]# ./a.out
length of test is 4
length of test is 7
---------END----------
-----Original Message-----
From: Jonathan Ellis [mailto:jbellis@gmail.com]
Sent: Tuesday, December 15, 2009 9:27 PM
To: cassandra-user@incubator.apache.org
Subject: Re: how to transfer large data?
really, "binary" to thrift C++ is std::string?
that doesn't make much sense to me, but I don't know C++...
On Mon, Dec 14, 2009 at 11:16 PM, XL.Pan <pa...@sina.com> wrote:
> hi,
> I want to use the Cassandra to store pictures(about 100k ~ 3M). I don't
know
> how to write the client, because I find the value's type in the Column
class
> is std::string.
> How can I deal with this?? My key type is int and value type is raw
> data(about 120K). Thanks! :-)
>
> 2009-12-15
> ________________________________
> XL.Pan
Re: how to transfer large data?
Posted by Jonathan Ellis <jb...@gmail.com>.
really, "binary" to thrift C++ is std::string?
that doesn't make much sense to me, but I don't know C++...
On Mon, Dec 14, 2009 at 11:16 PM, XL.Pan <pa...@sina.com> wrote:
> hi,
> I want to use the Cassandra to store pictures(about 100k ~ 3M). I don't know
> how to write the client, because I find the value's type in the Column class
> is std::string.
> How can I deal with this?? My key type is int and value type is raw
> data(about 120K). Thanks! :-)
>
> 2009-12-15
> ________________________________
> XL.Pan