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Cloudera, BigData, Semantic IoT, Hadoop, NoSQL

Cloudera CDH/CDP 및 Hadoop EcoSystem, Semantic IoT등의 개발/운영 기술을 정리합니다. gooper@gooper.com로 문의 주세요.


1. 현재 연결된 기기 확인

(아래는 31.7GB(/dev/mmcblk0)과 1000.2 GB(/dev/sda)의 2개의 외장기기 확인됨

   /dev/mmcblk0는 /dev/mmcblk0p1과 /dev/mmcblk0p2의 2개 파티션으로 구성 되어 있고

          /dev/sda는 /dev/sda1로 파티션 1개로 구성되어 있음)

root@slave1:~# fdisk -l

Disk /dev/mmcblk0: 31.7 GB, 31657558016 bytes
4 heads, 16 sectors/track, 966112 cylinders, total 61831168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xf7e9dfe5

        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1            2048       40960       19456+  81  Minix / old Linux
/dev/mmcblk0p2           40961     7577599     3768319+  81  Minix / old Linux

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xc197d009

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048  1953521663   976759808    7  HPFS/NTFS/exFAT

 

2. device에 mount할 폴더 생성

root@slave1:~# mkdir /app
root@slave1:~# mkdir /app/usb
root@slave1:~# mkdir /app/usb2
root@slave1:~# mkdir /app/hdd

 

3. hdd는 인식가능하게 파티션을 생성해야함..

root@slave1:/# fdisk /dev/sda

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel with disk identifier 0xb092454e.

Changes will remain in memory only, until you decide to write them.

After that, of course, the previous content won't be recoverable.


Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)


The device presents a logical sector size that is smaller than

the physical sector size. Aligning to a physical sector (or optimal

I/O) size boundary is recommended, or performance may be impacted.


Command (m for help): o

Building a new DOS disklabel with disk identifier 0xb5607451.

Changes will remain in memory only, until you decide to write them.

After that, of course, the previous content won't be recoverable.


Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)


The device presents a logical sector size that is smaller than

the physical sector size. Aligning to a physical sector (or optimal

I/O) size boundary is recommended, or performance may be impacted.


Command (m for help): n

Partition type:

   p   primary (0 primary, 0 extended, 4 free)

   e   extended

Select (default p): p

Partition number (1-4, default 1): 

Using default value 1

First sector (2048-1953525167, default 2048): 

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-1953525167, default 1953525167): 

Using default value 1953525167


Command (m for help): w

The partition table has been altered!


Calling ioctl() to re-read partition table.

Syncing disks.


4. 작성된 파티션을 사용하기 위해 파일시스템을 생성한다.

(아래는 전체를 파티션 1개로 설정한 경우임)

root@slave1:/# mkfs -t ext4 /dev/sda1

mke2fs 1.42.5 (29-Jul-2012)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

61054976 inodes, 244190390 blocks

12209519 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=0

7453 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks: 

        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 

        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 

        102400000, 214990848


Allocating group tables: done                            

Writing inode tables: done                            

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done     


*파티션 정보 확인

root@slave1:/# fdisk -l


Disk /dev/sda: 1000.2 GB, 1000204886016 bytes

81 heads, 63 sectors/track, 382818 cylinders, total 1953525168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk identifier: 0xb5607451


   Device Boot      Start         End      Blocks   Id  System

/dev/sda1            2048  1953525167   976761560   83  Linux


Disk /dev/mmcblk0: 31.7 GB, 31657558016 bytes

4 heads, 16 sectors/track, 966112 cylinders, total 61831168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xf7e9dfe5


        Device Boot      Start         End      Blocks   Id  System

/dev/mmcblk0p1            2048       40960       19456+  81  Minix / old Linux

/dev/mmcblk0p2           40961     7577599     3768319+  81  Minix / old Linux

root@slave1:/# fdisk -l


Disk /dev/sda: 1000.2 GB, 1000204886016 bytes

81 heads, 63 sectors/track, 382818 cylinders, total 1953525168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk identifier: 0xb5607451


   Device Boot      Start         End      Blocks   Id  System

/dev/sda1            2048  1953525167   976761560   83  Linux


Disk /dev/mmcblk0: 31.7 GB, 31657558016 bytes

4 heads, 16 sectors/track, 966112 cylinders, total 61831168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xf7e9dfe5


        Device Boot      Start         End      Blocks   Id  System

/dev/mmcblk0p1            2048       40960       19456+  81  Minix / old Linux

/dev/mmcblk0p2           40961     7577599     3768319+  81  Minix / old Linux


5. device와 폴더 연결(mount)

root@slave1:/# mount /dev/sda1 /app/hdd

 

6. 자동 mount설정

 vi /etc/fstab에 아래의 내용을 추가한다.

 

 /dev/sda1       /app/hdd        ext4    defaults        0       0


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500 Kafka Offset Monitor로 kafka 상태 모니터링 하기 file 2016.11.08 654
499 동시에 많은 요청이 endpoint로 몰려서java.net.NoRouteToHostException가 발생하는 경우의 처리방법 2016.10.17 654
498 Job이 끝난 log을 볼수 있도록 설정하기 2016.05.30 651
497 kudu table와 impala(hive) table정보가 틀어져서 테이블을 읽지 못하는 경우(Error Loading Metadata) 조치방법 2023.11.10 650
496 Error: Could not find or load main class nodemnager 가 발생할때 해결하는 방법 2015.06.05 646
495 [Kudu]ERROR: Unable to advance iterator for node with id '2' for Kudu table 'impala::core.pm0_abdasubjct': Network error: recv error from unknown peer: Transport endpoint is not connected (error 107) 2023.03.16 644
494 db를 통째로 새로운 이름의 db로 복사하는 방법/절차 2017.11.14 638
493 Impala Admission Control 설정시 쿼리가 사용하는 메모리 사용량 판단 방법 2023.05.19 637
492 Container killed by the ApplicationMaster. Container killed on request. Exit code is 143 Container exited with a non-zero exit code 143 TaskAttempt killed because it ran on unusable node 오류시 조치방법 2017.04.06 632
491 Error: java.lang.RuntimeException: java.lang.OutOfMemoryError 오류가 발생하는 경우 2018.09.20 631
490 spark-submit 실행시 "java.lang.OutOfMemoryError: Java heap space"발생시 조치사항 2018.02.01 631
489 spark-shell실행시 "A read-only user or a user in a read-only database is not permitted to disable read-only mode on a connection."오류가 발생하는 경우 해결방법 2016.05.20 625
488 Scala에서 countByWindow를 이용하기(예제) 2018.03.08 612
487 spark client프로그램 기동시 "Error initializing SparkContext"오류 발생할때 조치사항 2016.05.27 610
486 java.util.NoSuchElementException발생시 조치 2014.08.27 610
» 외부 기기(usb, 하드)등 mount(연결)하기 2014.08.03 610
484 hive기동시 Caused by: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D 오류 발생시 조치사항 2016.09.25 608
483 Query 1234:1234 expired due to client inactivity(timeout is 5m)및 invalid query handle 2022.06.10 600
482 [Hive canary]Hive에 Metastore canary red alert및 hive log파일에 Duplicate entry '123456' for key 'NOTIFICATION_LOG_EVENT_ID'가 발생시 조치사항 2023.03.10 594
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