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Questions tagged [tombstone]

For questions about how the tombstone feature of a data-store or database works, or about how to implement such functionality.

A tombstone is a marker or flag used to indicate that a record has been deleted, as a substitute for actually deleting the record and immediately reclaiming the space it used. SQLServer, Microsoft Synchronization Services and Cassandra use tombstones.

Using tombstones can improve execution speed, at the cost of increased storage space.

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Error dumping tombstone

I'm using debugger to process android dump, but I'm getting some errors. What's the problem? shell@K80M:/ $ debuggerd 2974 Sending request to dump task 2974. Error dumping tombstone.
steve
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cassandra blobs, tombstones and space reclamation

I'm trying to understand how quickly space is reclaimed in Cassandra after deletes. I've found a number of articles that describe tombstoning and the problems this can create when you are doing range queries and Cassandra has to scan through lots…
Brad Peabody
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how to get the info via the address of library(so) when in gdb

The process has crashed and grave(tombstone) been generated. It was triggered by signal 6(SIGABRT). And the backtrace is shallow: signal 6 (SIGABRT), code 0 (?), fault addr -------- r0 00000000 r1 000008b5 r2 00000006 r3 000008b5 r4…
Loach Fish
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Can not get rid of tombstones in cassandra 2.1.8 using (STCS) SizeTieredCompactionStrategy

I have a 3 nodes cassandra (2.1.8) cluster on which I am running application using titan db (v0.5.4). The amount of data is very small (<20 MB) but as my use case require deletes from time to time I already have problems with tombstones. I can not…
Krzysztof Genge
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How to get tombstone file generated with guarantee when killing android process

I have to simulate the situation where existing android process will be killed and as a result tombstone file will be generated immediately. I use following command sequence in order to achieve that: adb shell monkey -p com.google.android.apps.maps…
Viktor Malyi
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How to remove tombstones of secondary index in Cassandra

After scanning 100k tombstones, cassandra will error out the query, I tried to do major compaction on the table, but it doesn't remove tombstones of its secondary index. The query still can not be completed. I searched for a while, one suggestion…
Haoqing Geng
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Apache Cassandra : Hints are getting created continuosly even if all the nodes are up

I have a 5 node apache cassandra 2.0.6 cluster with 48 GB ram and 2 TB data directory and commit log directory with 93 GB capacity. The JVM heap space for cassandra is 8 GB. I use JVisualVM Mbeans plugin for monitoring the cassandra metrics. The…
venkat sam
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Predictable Cassandra row deletion

We have a write-heavy workflow on a 1.2.5 Cassandra cluster. As disk space is limited, we must delete older data occasionally. This deletion starts when the amount of free disk space drops to a certain level. We have learnt the role of tombstones,…
mbazs
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Random phone reboot (tombstone added)

I'm testing my app that make extensive use of Bluetooth antenna. Sometimes my phone reboots for no apparent reason. I've extracted the last tombostone I got from the phone. Can you help me to understand the reason behind the reboot? I feel like is…
Vittorio Cozzolino
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WP7 Application Lifecycle

Ok, this is what I know so far about the Windows Phone 7.1 application life-cyle, but I still have a few questions. Application Launching - Called on application start-up, then proceeds to initializes App and then MainPage. Applicaiton Deactivated …
methodMan
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Backstack Tombstone wp7

I have just finished tombstoning a page in my application when I noticed that I only tombstone the page I am currently viewing, meaning that after I return the pages in the backstack lose all their members and doesn't get tombstoned.. I only find…
Igor Meszaros
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Tombstone a usercontrol in wp7

I have created a roundtextbox usercontrol and using it on all pages. While debugging for Tombstone , I see only a single line in place of round textbox. I tried to save the state of textbox/Grid containing the textbox/Page but still the roundtextbox…
Kenny
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