Various file lengths while uploading the same file

[arthurtumanyan@xxxxxxxxx (Arthur Tumanyan)]

Hi,
I'm writing an fastcgi application, which just gets data from stdin and
appends it to ceph.
Please,have a look:

                while (0 != (written = fread(buffer, sizeof (char), sizeof
buffer, stdin))) {
                    if (written < 0) {
                        logger("Error: %s\n", strerror(errno));
                        break;
                    }
                    err = rados_aio_append(io, filename, comp, (const char
*) buffer, written);
                    if (err < 0) {
                        logger("Could not schedule aio append: %s\n",
strerror(-err));
                        rados_aio_release(comp);
                        rados_ioctx_destroy(io);
                        rados_shutdown(cluster);
                        break;
                    } else {
                        if (len >= (100 * MB)) {
                            if (0 == (i % (50 * MB)) && i != 0) {
                                logger("Uploaded %d bytes", i);
                            }
                        }
                        i += written;
                    }
                }

I test like this:
curl -XPUT -T guide.pdf  "http://95.211.192.129:81/upload?pics|guide.pdf"
-i -v

In most cases all works fine, but sometimes for (big files) , ceph/or
application corrupts file. And the same file may have various sizes

ceph1 07:14:46 UploadToCeph # rados -p pics stat 1024.img
pics/1024.img mtime 1400335784, size 1019215872

As you can see, the size is smaller than should be. Can anyone point me
what's wrong,please ?

Thanks in advance
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