Linux Kernel kernel KERNEL _ ldd3 kernel KERNEL _ Cut kernel Kernel

Cut the worker ( ※Please refer to the following link for more information: )
Cut the number of rows when there are too many rows during the same time.
Zookeeper and zookeeper zookeeper.
When multiple regions are used on the scene, the signal when the traffic is reduced, and when the traffic is reduced, the signal when the traffic is reduced.
1). Cut the worker
1. Number of worker nodes
Cut the number of users who have already been written into these databases, and then begin to use them in their initial stages. when there are too many rows when there are too many rows.
When cutover is used, the system fails to be accessed immediately if necessary. (<Linux/interrupt. h>)
Int request_irq
Unsigned int IRQ,
Irqreturn_t (* Handler) (INT, void *, struct pt_regs *),
// Please wait until then
Unsigned long flags,
// Cut the worker owner
Const char * dev_name,
// Cut the worker nodes back to the worker node. A total of worker nodes are used to merge the worker nodes. A total of zookeeper fields combined with null.
Void * dev_id );
Void free_irq (unsigned int IRQ, void * dev_id );
Int can_request_irq (unsigned int IRQ, unsigned long flags );

※1 "request_irq" refers to the locations where the request is being sent, and when the request is being sent,
When there are too many other "cutover worker.
※2 "free_irq" refers to the outgoing shard location, when there are too many shards, And then when there are too many shards,
"CPU cutover and cutover in the future" cannot exceed the upper limit when the upper limit is reached "when the upper limit is reached.
※3 "can_request_irq" cannot exceed the limit when calling "request_irq". When the limit is reached, the limit is reached when the limit is reached.
②./Proc has already been released.
Else 「/proc/interrupts 」
The "/proc/interrupts" section shows the number of requests being processed.
When there are too many threads to cut the number of threads, the CPU usage will be notified too many threads, too many threads, too many internal threads, too many threads.
"/Proc/interrupts" has been released, and there are already too many such problems.
Else 「/proc/STAT 」
When there are too many attempts, there are still too many attempts. When the cost is low, there is still a typical metric. Start to reduce the number of shards in the affected regions, including the number of shards in the affected regions.
Zookeeper and zookeeper/zookeeper and zookeeper have been used to cut the signal between the zookeeper and the United States. "/proc/ interrupts.
③ IRQ No. indicates the automatic prediction.
During the initial phase, when the initial phase was reached, when the initial phase was reached, the IRQ signal was used to determine the method.
Manual manual automatic output
Unsigned long probe_irq_on (void );
Int probe_irq_off (unsigned long );

※1 "probe_irq_off" refers to the number of workers before the quota is exceeded, "udelay" is required, and the CPU quota is optimized,
When necessary, the system will cut the number of concurrent users, and the number of concurrent users will be reduced in a short period of time.
※2 auto-generated snapshot and automatic snapshot creation during the specified period.
Auto-generated
Automatically generate an Alibaba Cloud account, renew your account, and renew your account. If you do not use the Alibaba Cloud account, you cannot renew your account. wait until there are too many other users.
Required Bytes: request_irq required free_irq required bytes.
Please refer to "zookeeper" IRQ in advance to learn about zookeeper joint ventures, Zookeeper zookeeper and zookeeper. dynamic and automatically generated dynamic rows.
In advance, "zookeeper" IRQ was informed about the joint venture and irq0 ~ IRQ NR_IRQS-1 has been released since then.
4. High-speed hybrid cloud
The latest high-speed cutting, high-speed cutting, and low-speed cutting have been achieved.
ただ, high-speed cutover み (sa_interrupt) が, カレ,
He attempts to completely cut the number of rows without any errors. when there are already too many other users.
2) install strongswan
(1) generally, there are always too many other users.
When reading, the cutover worker.
The only region that has been used has been changed, and the region where the region has been changed,
When there is no space, please try again later.
When there are too many threads, there are too many other threads
Except gfp_atomic, ったメ え
Bytes. When there are too many rows when there are too many rows
When the specified Schedule role calls the outgoing employee quota, the specified employee quota has been reached.
②. Attention
Bytes. When the rows are being processed, the minimum time limit is reached.
For a long period of time, the computing workload is calculated as follows: the maximum number of rows is reached, and the maximum number of rows is reached. when there are too many threads,
During the peak security period, the calculation is as follows.
(3) Comment comment
/* [Reference]
IRQ: cutoken
Dev_id,
Cut the number of rows between two groups.
Generally, Zookeeper, dev_id zookeeper, Zookeeper, and zookeeper are the most important components in the architecture.
Regs.

[Zookeeper]
Please refer to the following link for more information,
If the parameter is not specified, "irq_none" is returned.
When zookeeper upload and zookeeper upload "irq_retval (handled)" then generate zookeeper upload.
*/
Irqreturn_t sample_interrupt (int irq, void * dev_id, struct pt_regs * regs)
{
Xxx

Wake_up_interruptible (& sample_queue);/* handle the problem */

Return xxx;
}
(4) The number of cutover and cutover operations has been optimized, and the number of cutover operations has not been optimized.
Cause:
Please refer to the following link for more information: when there are too many requests, You need to renew them.
The speed problem is still being solved. when the problem is solved, it is necessary to continue the operation.
(For example, Zookeeper, trusted clients if zookeeper 1 was zookeeper) trusted clients when Zookeeper 2 was cut when zookeeper was established when zookeeper was taken over during peak hours. .)
※Zookeeper and zookeeper, and the number of zookeeper and zookeeper operations that have been processed in this case cannot be modified. zookeeper too many requests.

When a single segment is cut, there is no limit to the segment.
Void disable_irq (int irq); // ① specify whether the clientworker is cut, and then the clientworker is not immediately dropped.
// ② When the segment is cut, the segment is broken, and then the segment is broken.
Void disable_irq_nosync (int irq); // No sync
Void enable_irq (int irq );
※1. Please refer to the following technical details for further help.
※2. Please refer to the following link for more information. Zookeeper was found, and a total of zookeeper was used to cut the signal when the signal was too large.
※3 CPU usage images are fully renewed.
When all the above operations are performed, they are all cubed and there is no such operation.
Void local_irq_save (unsigned long flags); // ① cut into bytes and then save them.
// ② Cutover, renewal, configuration, and payment are not supported.
Void local_irq_disable (void.

void local_irq_restore (unsigned long flags);
void local_irq_enable (void);
※1 worker CPU worker.
3), the first half and the last half
cut the upper half of the segment and then adjust the upper half of the segment. when there are too many rows when there are too many rows.
in Linux, there are two major issues: problem solving, problem solving, and problem solving. finally, I decided to continue using it.
upper half (top half) "Too many attempts were made to cut the number of requests when there were too many requests, too many requests were sent to request_irq records, and so on. ※Cut the lower half (bottom half) "When the first half of the website is being processed, there will be temporary traffic during peak hours. Later, there will be temporary traffic during peak hours. during peak hours, the website will be cut. みが

In the later half of this section, you can use zookeeper to install zookeeper.
① When there is no such thing
When there are too many other users
Large-volume high-speed compaction mechanisms have been adopted, and large-volume compaction has been implemented.
The number of rows in which the cutover worker.
How can this problem be solved? too many requests.
Zookeeper, and zookeeper.

The reason for this is that the computer cannot be used in other regions, and the computer can be used in other regions.
When the SMP protocol has been used successfully, there are still too many threads in the pipeline, and there are other threads in the pipeline. When there are too many threads in the pipeline, there are too many threads in the pipeline. too many requests.
When there are too many rows, there are too many rows in the rows, don't cut them too many rows when there are too many rows.
Please refer to the following link for more information.
② Job waiting Column
For example
Please wait for a long period of time before you can renew your subscription, When there are too many other users Method.
In the future, there will be temporary periods of time, and special periods of time when there will be too many temporary periods of time when there will be too many rows in the temporary periods of time.
When there is no space between them, there is no need to wait until there is no such reason.
During the renewal and renewal period, the renewal period shall be limited to the number of on-site contracts, or the number of operation periods within a period of time. when the column is deleted successfully.
4) The number of cutover worker workers is
For example, PCI has always been used to cut the number of rows between two groups. In the example of shaojie, there are two groups, namely zookeeper and ISA zookeeper.
(1) There are always too many threads, too many threads, too many threads.
The number of cutover worker.
Signature parameter "sa_shirq" in flags authorization specifies signature.
The number of arguments dev_id contains, too many arguments have been written into these arguments. (Zookeeper was aware of the zookeeper dev_id provided to enable zookeeper)
In addition, a total of zookeeper users have been using dynamic route for auto-launch capabilities to dynamically redirect requests.
Fortunately, the number of cutover and cutover worker too many requests.
When "enable_irq" and "disable_irq" are used, the specified parameter cannot be reached.
(2) Too many rows.
Zookeeper requires that the primary node be used to obtain the primary node, log on to the primary node, and perform other operations on the primary node.
Zookeeper has been added, and a total of zookeeper has been split into two groups. zookeeper has been cut into two groups. otherwise, you must renew your subscription.
When "dev_id" is used in other regions
When the segment is cut, the segment is retained, and the segment is different.
③./Proc has already been used to cut the number of rows in total.
In total, the "/proc/interrupts" operator is used together with the operator to cut the number. "/Proc/STAT" has been found to indicate that has been completed successfully.

(5) Cut the worker I/O
The reason why the system has been delayed in the future? please refer to the following link for more information.
Please write & read them before sending them into another region before sending them to the trusted manager.
All the technical capabilities of Alibaba Cloud are high.

During this period, the system was interrupted, and the system was cut down.
Zookeeper, Zookeeper and zookeeper. When there are too many threads, the number of threads is reduced, the number of threads is reduced, and the number of threads is reduced.