bug crush

Edit Crush Map:1, obtain crush map;2, anti-compilation crush map;3. Edit at least one device, bucket, rule;4, recompile crush map;5, re-inject crush map;Get Crush MapTo get the crush ma

Ceph crush the question to read over and over again, the relevant chapters of the CEPH source analysis book are summarized as follows:4.2.1 Hierarchical Cluster MapExample 4-1 Cluster map definitionHierarchical cluster map defines the static topology of the OSD cluster with hierarchical relationships. The level of the OSD enables the crush algorithm to realize the ability of the rack-aware (rack-awareness)

[Email protected]:~# ceph OSD Tree # id Weight type name up/down reweight -1 0.05997 Root Default -2 0.02998 Host Osd0 1 0.009995 Osd.1 up 1 2 0.009995 Osd.2 up 1 3 0.009995 Osd.3 up 1 -3 0.02998 Host OSD1 5 0.009995 Osd.5 up 1 6 0.009995 Osd.6 up 1 7 0.009995 Osd.7 up 1 Storage nodeBefore you go any further, consider this: Ceph is a distributed storage system, regardless of the details of its "distributed logic", where the data is ultimately stored on the device.There are t

friend to accompany, to cavity affectionate, to a love, watch the distant Qiannian, let miss such as flowers, fragrance you my appearance, criss you I a life of heartache and helplessness. The destiny of this life is no part, can only look forward to each other's good, happy, happy. in this life, rendering you my lonely, painful sadness, your happiness is my only hope in this lifetime, the present in the deep love for you, can only be a lifetime of missing and concerned about, a life of the wat

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Decoration mode (old crush) | -- What is the decoration mode. Decoration mode: whether it is you or you. Please use the classic words of Lao Cui ). It appears from inheritance, first inherited, and then decorated. Recall inheritance Benefits: Improves reusability and enables reuse. Later extensions can be used through method rewriting. Disadvantage: because of the inheritance relationship between classes, their relationships are enhanced, and their co

As we mentioned earlier, Ceph is a distributed storage service that supports a unified storage architecture. A brief introduction to the basic concepts of ceph and the components that the infrastructure contains, the most important of which is the underlying rados and its two types of daemons, OSD and Monitor. We also dug a hole in the previous article and we mentioned crush. Yes, our tutorial is an incomplete ceph textbook because we are talking abou

relish the "Cache Hit ration" but still maintain a relatively high level of 98! This case tells us that the cache hit rate performance counter is often not a problem. 　　 4, OK, in this case, who occupies the memory that belongs to my dear SQL Server? We continue, open wiindows task management, select the Process tab, click to show all the user processes, found that Svchost.exe occupies the vast majority of 60G memory! 　　 5. What is that svchost.exe? We use processmonitor this tool below, op

Crush Algorithm1, the purpose of crushOptimize allocation data, efficiently reorganize data, flexibly constrain object copy placement, maximize data security when hardware fails2. ProcessIn the Ceph architecture, the Ceph client is directly read and written to the Rados Object stored on the OSD, so ceph needs to go through (pool, Object) → (pool, PG) →osd set→osd/disk complete link to allow Ceph client Know exactly where the target data object is loca

The Ceph Crush algorithm (controlled Replication under Scalablehashing) is an algorithm based on data distribution and replication for random control.Basic principle:Storage devices typically support stripe to increase storage system throughput and improve performance, and the most common way to stripe is to do raid. As RAID0.The data is distributed in strips on the hard disk in the array, which is the stored procedure of the data in all the hard driv

This question is about implementing a basic elimination algorithm for Candy Crush. Given a 2D integer ArrayboardRepresenting the grid of candy, different positive integersboard[i][j]Represent different types of candies. A valueboard[i][j] = 0Represents that the cell at position(i, j)Is empty. The given board represents the state of the game following the player's move. Now, you need to restore the Board toStable StateBy crushing candies according to t

How does the Win7 system completely crush files? 1, the use of Baidu search software "Computer Butler", select "Ordinary Download"; 2, install the software to download good to the computer, open the software main interface, select the "toolbox"; 3, in the Toolbox more tools, find "File smash" open; 4, open the file shredding software, at the bottom of the interface to choose to

[] Ispalindrome =New Boolean[S.length ()][s.length ()]; int[] Cut =New int[S.length ()]; for(intj = 0; J ) {Cut[j]=J; for(inti = 0; I ) { if(S.charat (i) = =S.charat (j) (j-i ])) {Ispalindrome[i][j]=true; if(I > 0) {Cut[j]= Math.min (Cut[j], cut[i-1] + 1); } Else{Cut[j]= 0; } } } } returnCut[s.length ()-1]; }This is just a few lines. It can be observed that the part of the palindrome matrix is the same. The key is the cut array.CUT[J] repr

all, English proficiency is limited ~~!I'm going to take a good look at these books, and talk about algorithms, I have to increase the number, now feel high number is really important, but I did not study hard, high school when I mathIs good, really ashamed of the math teacher, see the back of the Fourier transform, there is no high-number foundation really ugly understand.In short, I am now the intention is to learn the basis of the algorithm, to participate in the school recruit, and then I h

linenumberreader /*** @ Author hubiao * simulates linenumberreader *. Similarly, the simulation is to define a class. The special method provided by the simulation requirement is to obtain each row and then read each row. */Public class mylinenumberreader extends reader {/* receives the passed subclass object, Fu F = new Zi (); // polymorphism */private reader; private int linenumber; // The row number is public mylinenumberreader (Reader reader) {This. reader = reader;} public int read (cha

= [NSNumber numberwithfloat:-m_pi/180*5]; Anima.values = @[value1,value2,value3]; Anima.repeatcount = maxfloat; [_coverbtn.layer Addanimation:anima Forkey:nil]; _coverbtn.alpha = 0; _coverbtn.centerx = _praisebtn.centerx; } completion:^ (BOOL finished) {_coverbtn.frame = _praisebtn.frame; _praisebtn.userinteractionenabled = YES; }]; } else {_cancelpraiseimg.hidden = NO; Nsarray *imgarr = [Nsarray arraywithobjects:[ui

choose to use the red and black tree as the node storage structure, in addition to the need to implement basic red and black tree insertion, deletion, find the basic function, we should also add another query lookup function, to find the smallest node larger than the key.C++map internal implementation is the red-black tree, that is, the direct use of stl::map can be.Code reference:Consistency hashing algorithm and C + + implementationReference:Consistency hashing algorithm Learning and Java Cod

box2dweb, these joints connect the parts together, then if these joints are destroyed, then these parts will be scattered. But how do we destroy the joints? There is a destroyjoint function in Box2dweb's B2world, and the parameter is the B2joint object you want to destroy. Let's see how the joints are destroyed in the lufylegend.First, the function that passes through the LBOX2D key joint in Lufylegend will return the created B2joint object, which means:var j = LStage.box2d.setRevoluteJoint (A.

Jinshan Poison PA 2011 provides the file shredder, can completely crush confidential documents. In addition to the "Security visionary" click "File Shredder", select files to delete operations, there is a particularly convenient and quick way: In the folder to select the files to be crushed, click the right mouse button, select "Use Jinshan Smash device to delete files completely." If you do not have this option in the right-click menu, you ca

), and very early on we relish the "Cache Hit ration" But still maintain a relatively high level of 98! This case tells us that the cache hit rate performance counter is often not a problem. 4, OK, in this case, who occupies the memory that belongs to my dear SQL Server? We continue, open wiindows task management, select the Process tab, click to show all the user processes, found that svchost.exe occupy the vast majority of 60G memory! 5. What is that svchost.exe? We u