platform developed by Yahoo, the main advantage is to compare the performance of each platform, he has the mainstream database test interface, including Mongodb,hbase,cassandra, and so on, using YCSB test HBase, when the basic environment of the test is ready, There are probably a few files below our YCSB Client folder:
[ycsb-hbase10-binding-0.12.0-snapshot]# ll-l
total dosage
drwxr-xr-x 2 root root 4096 September 5 11:38 bin
Drwxr-xr-x 2 root 4096 September 5 09:54 conf
drwxr-xr-x 2 ro
Hugepage IntroductionHugepage technology is an added feature of Linux in Kernel 2.6, the basic principle is: use a larger page to achieve greater memory access! This technology can be supported in Linux kernel 2.6 and above, 32-bit and 64-bit! The size of the Fan Wei is 2MB to 256MB, depending on the kernel version and the server hardware architecture! Hugepage Benefits:
1. Increase the hit ratio of the TLB;
2. The page is locked in memory, reducing memory swapping; 3. Loc
+501 lists files or directories with a user's ID greater than 501 in the/home directoryFind/home-group CNSCN list files or directories in/home with group CNSCNFind/home-gid 501 lists files or directories with a group ID of 501 in/homeFind/home-nouser lists files or directories in/home that are not local usersFind/home
Large"414": Request-URI Too Large"415": Unsupported Media Type"416": Requested range not satisfiable417 ": Expectation Failed500 ": Internal Server Error"501": Not Implemented"502": Bad Gateway"503": Service Unavailable"504": Gateway Time-out"505": HTTP Version not supported
HTTP 400-invalid requestHTTP 401.1-unauthorized: Logon FailedHTTP 401.2-unauthorized: logon fails due to server configuration problemsHTTP 401.3-ACL prohibit Resource AccessHTTP
enough memory to be allocated [plain] [root @ obe11g ~] # Echo 20>/proc/sys/vm/nr_hugepages (3) increase the maximum size of shared memory segments. In this example, 12G [plain] [root @ obe11g ~] # Echo 1560281088>/proc/sys/kernel/shmmax (4) increase the size of shared memory, 4 K [plain] [root @ obe11g ~] # Echo 4194304>/proc/sys/kernel/shmall groups add the mysql user group to the system kernel [plain] [root @ obe11g ~] # More/proc/sys/vm/hugetlb_shm_group 0 [root @ obe11g ~] # Id mysql uid =
the request data format is not supported by the requested resource.416 Request Range Not Satisfialbe417 Expectation FailedServer Error==========================================500 Internal Server ErrorThe server encountered an exception and blocked the execution of the current request.501 Not ImplementedThe server does not have an action to complete the current request.502 Bad Gateway503 Service UnavailableThe server cannot process the current reques
HTTP error code meaning:"Continue":"101": Witching Protocols"$": OK"201": Created"202": Accepted"203": non-authoritative information"204": No Content"205": Reset Content"206": Partial Content"Multiple": Choices"301": Moved Permanently"302": Found"303": See other"304": Not Modified"305": Use Proxy"307": Temporary Redirect"$": Bad Request"401": Unauthorized"402": Payment Required"403": Forbidden"404": Not Found"405": Method not allowed"406": not acceptable"407": Proxy authentication Required"408":
-Server init.d]# rpm -ev MySQL-devel-5.6.23-1.linux_glibc2.5
[root@DB-Server init.d]# rpm -ev MySQL-server-5.6.23-1.linux_glibc2.5
You have new mail in /var/spool/mail/root
[root@DB-Server init.d]# rpm -ev MySQL-client-5.6.23-1.linux_glibc2.5
[root@DB-Server init.d]#
5. Delete the folder corresponding to MySQL.
Check whether the MySQL folders are cleaned and deleted.
[root@DB-Server init.d]# whereis mysql
mysql:
[root@DB-Server init.d]# find / -name mysql
/var/lib/mysql
/var/lib/mysq
maximum volume of the current table.
Threshold = (INT) Table. length * loadfactor
After clarifying these definitions, let's look at the specific solution.
Key hash:
Let's take a look at an example to get a clearer picture of how it works and avoid text definition. Here is an example of the book number. For example, there are some numbers as follows:
78938-0000
45678-0001
72678-0002
24678-0001
16678-0001
98678-0003
85678-0002
45232-0004
Steps:
1. Use the number as the ke
HTTP Error Code Description:"100": continue"101": witching protocols"200": OK"201": created Quot; 202 quot;: accepted"203": Non-authoritative information"204": NO content"205": reset content"206": Partial content Quot; 300 quot;: Multiple Choices"301": moved permanently"302": Found"303": see other Quot; 304 quot;: not modified"305": use proxy"307": Temporary redirect"400": Bad request"401": unauthorized"402": payment required"403": forbidden"404": not found"405": method not allowed"406": Not
-bash-4.1$ CD ~-bash-4.1$ pwd/tmp/rachy-bash-4.1$ Logout[Email protected] ~]#As you can see, modifying the passwd configuration file directly modifies the user's home directory.6./etc/passwd file with ":" As a delimiter, what does the third and fourth fields mean? What happens if I change the third field in a row to ' 0 '?A: The third and fourth fields represent the user ID and the group ID, respectively, and if you change the third field of a row to 0, the user becomes the root user. For the me
In this article, we begin to analyze and discuss the problems of operation and game in the Olympiad, in fact, some game problems (such as Ba Shi Game, Nim game), which are involved in the information contest, are essentially combinatorial games in combinatorial mathematics, which is not the game theory in the real sense.Let us look at the following, which contains the "winning strategy" of the combination of the game has what kind of mystery.Question one: Two people alternately write on the blac
You can manage linux users and user groups to help beginners. 1. add the user syntax: useradd [option] [user account] parameter: -c: specifies a descriptive description.-d: specifies the starting directory for user logon.-g: specifies the group to which the user belongs... capital
Nothing left to worry about. sort out linux User and user group management, hoping to be useful to beginners.
1. add a user
Syntax: useradd [option] [user account]
Parameters:
-C: specifies an annotation description
Forbidden-access is not required even with authorization.404 Not Found-the server cannot find the given resource; The document does not exist.407 Proxy authentication Request-The client must first use the proxy to authenticate itself.415 media type is not supported-the server denies the service request because the format of the requested entity is not supported.
Errors that occur in the 5XX server
500 INTERNAL Error-the server could not complete the request because of an unexpected situation.
, indicating that the stock price began to enter a strong state, bullish market has begun, you can consider buying.(4) DMI death CrossWhen the trend line above the 50 value of the speed of operation, while the ADX and ADXR temperature line has entered the 70 high temperature zone, at this time the PID trend line Di1 line down the head Di2 line up the death cross, at this time the pro disk to consider selling in batches.PS, if the DMI's golden Cross or death crosses, with the corresponding EMA tr
Http://www.cnblogs.com/jianglangcaijin/p/3460012.htmlFirst, the number of matrices is sorted. Set size to insert a size number at a time. When inserting, we use h[i][j] to record whether the number of the position has been inserted, and sum[i][j] to represent the sum of the number of digits inserted by the sub-matrix (i,j). After each insertion, the brute force sweeps a query, if the number of queries sub-matrix is greater than or equal to K, the answer is ①in the inserted number; then the inqui
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