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fio基础11

rdma The RDMA I/O engine supports both RDMA memory semantics (RDMA_WRITE/RDMA_READ) and channel semantics (Send/Recv) for the InfiniBand, RoCE and iWARP protocols. falloc IO engine that does regular fallocate to simulate data transfer as fio ioengine. DDIR_READ does fallocate(,mode = keep_size,) DDIR_WRITE does fallocate(,mode = 0) DDIR_TRIM does fallocate(,mode = punch_hole) e4defrag IO engine that does regular EXT4_IOC_MOVE_EXT ioctls to simulate defragment activity in request to DDIR_WRITE event rbd IO engine supporting direct access to Ceph Rados Block Devices (RBD) via librbd without the need to use the kernel rbd driver. This ioengine defines engine specific options. gfapi Using Glusterfs libgfapi sync interface to direct access to Glusterfs volumes without options. gfapi_async Using Glusterfs libgfapi async interface to direct access to Glusterfs volumes without having to go through FUSE. This ioengine defines engine specific options. libhdfs Read and write through Hadoop (HDFS). The 'filename' option is used to specify host, port of the hdfs name-node to connect. This engine interprets offsets a little differently. In HDFS, files once created cannot be modified. So random writes are not possible. To imitate this, libhdfs engine expects bunch of small files to be created over HDFS, and engine will randomly pick a file out of those files based on the offset generated by fio backend. (see the example job file to create such files, use rw=write option). Please note, you might want to set necessary environment variables to work with hdfs/libhdfs properly. mtd Read, write and erase an MTD character device (e.g., /dev/mtd0). Discards are treated as erases. Depending on the underlying device type, the I/O may have to go in a certain pattern, e.g., on NAND, writing sequentially to erase blocks and discarding before overwriting. The w

04

Springboot 整合 sqoop

Sqoop是一款开源的工具,主要用于在Hadoop(Hive)与传统的数据库(mysql、postgresql…)间进行数据的传递,可以将一个关系型数据库(例如 :MySQL ,Oracle ,Postgres等)中的数据导进到Hadoop的HDFS中,也可以将HDFS的数据导进到关系型数据库中。 —来自:百度百科 以上是对sqoop的一个简单说明,具体我就不再多赘述。日常企业开发过程中,我们可能面对增删改查的业务比较多,但是作为一个程序员,我觉得不要局限于此,可能面对业务的场景不同。自然而然的对整个业务技术框架的认知也是有一定的局限性。今天跟大家分享这个Sqoop框架,基于springBoot进行整合。也许能够帮助你在你的简历中锦上添花,希望能够你带来薪资上的变化。 说起sqoop,我们必须要了解它的用途,主要应用于 RDBMS 与 Hadoop ( HDFS / Hive / HBase )数据传输迁移。我们主要通过这个工具主要作为归档数据同步使用辅助企业智能推荐及可视化大屏使用。为什么会用到sqoop,因为它解决了关系数据库与Hadoop之间的数据传输问题。基于它底层MR的本质,具有性能高、易用、灵活的特点。

02

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