有没有办法将文件从hdfs://old复制到hdfs://new到$check_faqs = "
SELECT
faq_title,
faq_url,
faq_content,
chapter_id
FROM
faqs
WHERE
faq_content LIKE '%". $search ."%'
AND faq_status != 'deleted'
";
$query_faqs = mysqli_query($con, $check_faqs);
if (mysqli_num_rows($query_faqs) !== 0) {
$faqs = array();
while($row = mysqli_fetch_assoc($query_faqs)) {
$chapter_info = array();
$query_chapter = mysqli_query($con, "SELECT chapter_title, chapter_url FROM faqs_chapters WHERE chapter_id = '". $row["chapter_id"] ."'");
$chapter = mysqli_fetch_assoc($query_chapter);
array_push($chapter_info, $chapter["chapter_title"]);
array_push($chapter_info, $chapter["chapter_url"]);
array_push($row, $chapter_info);
$faqs[] = $row;
}
$count_faqs = mysqli_num_rows($query_faqs);
$output = json_encode(array('type'=>'success', 'faqsCount' => $count_faqs, 'faqs' => $faqs));
die($output);
}
，而无需先下载文件然后重新上传？
答案 0 :(得分：0)
不了解WebHDFS，但这可以通过hadoop distcp实现。 该命令看起来像这样：
hadoop distcp hdfs://old_nn:8020/old/location/path.file hdfs://new_nn:8020/new/location/path.file