Without knowing it, cloud computing has been around for so many years. For the cloud, people are excited from the beginning of their contact with each other, continue to debate, and then fight for public cloud, private cloud, and hybrid cloud, now it's time to pull the cloud and witness "turning the cloud into rain.
From the blind pursuit of the cloud at the beginning to the present, users began to become rational. If they could bring direct benefits, they would be useless. Based on different a
new pfile through the spfile of the + ASM1 instance and try to start the + ASM2 instance. Similarly, the + ASM2 instance cannot be started.
SQL> startup nomount pfile = '/tmp/init + asm2.ora ';
The ORA-24324: service handle not initialized.
ORA-01041: internal error. hostdef extension doesn't exist
At the beginning of the year, it was suspected that it was a storage problem, so we began to check the storage status. This RAC uses the multipath + asmlib architecture.
Status of multipath q
HTTP (Hypertext Transport Protocol), which is the Hypertext Transfer Protocol. This protocol details the rules for communicating with each other between the browser and the World Wide Web server.Characteristics:
HTTP is called Hypertext Transfer Protocol, based on request/Response mode!
HTTP is a stateless protocol.
In order to facilitate the understanding of HTTP request and response protocol, use a section of PY to grasp packet analysisimport socketimport timedef handl
With future upgrades to file system protocols, such as NFS (including concurrent NFS, or PNFS), will NFS potentially replace many of the existing proprietary file systems?
Let's take digitalfilm tree for example, a company in Hollywood that provides post-processing and virtual effects services for the entertainment industry. The company employs products that include Apple Xsan, HP storageworks arrays, QLogic switches, and other storage vendors. They also use a hybrid operating system environmen
The file modification time on the NFS file system displays the problem of Solaris + NetApp storage. the user's home directory is placed on NetApp and mounted to the local through autofs. You can use ls-l to view the touch file in your home directory. the mtime (modifytime) column only displays the year, month, and day ,... the file modification time on the NFS file system displays the problem of Solaris +
VSC is a plug-in that NetApp stores on vsphere vcenter 4 and is not a vsphere client plug-in, so it must be installed on vcenter. After installation and then login vcenter, there is a NetApp tab in the Datastore view.
With VSC you can easily access NetApp storage and scan the ESX datastore on NetApp storage, whether i
a viable option, but applications such as databases directly choose to use logical volumes to implement snapshots because they cannot be managed by snapshot technology at the file system level. In general, there is no need to implement snapshots at the application layer, which can be implemented using the underlying file system or volume Manager interface for backup mechanisms, but requires a temporary pause to ensure snapshot data consistency. In general, software-layer-based snapshots are eas
NetApp Backup and Recovery solutions Director
David has more than 20 years of industry experience, especially data availability, data disaster recovery, and business recovery practices. He is co-author of the "Implement backup and Recovery: Enterprise Readiness Guide" and is recognized as an authority in the areas of backup and recovery, disaster recovery, and business recovery practices.
When people think of Ne
Next we will mainly explain the content of NFSv4. What are the features of the fourth NFS version? Let's take a look at it. NFS is composed of server software-for example, software running on NetApp storage-client software requiring access to network storage and running on the host. proper operations require that the two ends of the connection, that is, the client and the server are mature and have been correctly implemented. although
, this is the core challenge of NAS backup, and the network performance of the NAS is uneven. Q: Is ndmp a good choice for NAS backup? How does it work? Answer: NDMP was introduced to the industry about 10 years ago. That's when NetApp started to become active, and NetApp NAS devices are the kind of equipment that you can back up with headaches. Then people would ask, "How exactly do you back it up?"
The file modification time on the NFS file system displays the problem of Solaris + NetApp storage. The user's home directory is placed on NetApp and mounted to the local through autofs. You can use ls-l to view the touch file in your home directory. The mtime (modify time) column only displays the year, month, and day, but not the time. $ Touch file $ ls-l file-rw-r -- 1 user 0 Aug 25 2009 file after waiti
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cannot be continued.
Check ASM's alert. log to find:
ERROR: cocould not create voting files. It spans internal SS 161 AUs (max supported is 64 AUs)
ERROR: Voting file allocation failed for group VOTE
Errors in file/g01/11 ggrid/app/11.2.0/grid/diag/asm/+ ASM1/trace/+ ASM1_ora_7321.trc:
ORA-15303: Voting files cocould not be created in diskgroup VOTE due to small Allocation Unit size
View the corresponding DM of the arbitration disk of the corresponding GRID
# Multipath-ll
SC _vote (360a980003
AUs)
ERROR: Voting file allocation failed for group VOTE
Errors in file/g01/11 ggrid/app/11.2.0/grid/diag/asm/+ ASM1/trace/+ ASM1_ora_7321.trc:
ORA-15303: Voting files cocould not be created in diskgroup VOTE due to small Allocation Unit size
View the corresponding DM of the arbitration disk of the corresponding GRID
# Multipath-ll
SC _vote (360a980003830302d712b31686276736b) dm-11 NETAPP, LUN
Size = 5.0G features = '4 queue_if_no_path pg_init_retri
data is reconstructed and the new disk is added.
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To solve the above problems, some solutions will consider some data migration operations to obtain the benefits of distributed free space, but will affect the system performance.NetApp DDP
The new RAID technology of NetApp is also called the Dynamic Disk Pool, and it is similar to Quantum in m
). With the duplicate data deletion technique, the data is not changed, but the copy data about 2-n times is deleted, and the indicator is inserted into a "main instance" of the data. A single instance can be treated as a duplicate data deletion.
Traditional data deduplication is often not suitable for online software or primary storage software, because the algorithms needed to replicate data removal inevitably increase response time, which leads to increased costs. For example, popular de-dup
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