# \#cdt **URL:** https://discuss.aerospike.com/tag/cdt/63.md [Latest](https://discuss.aerospike.com/latest.md) · [Categories](https://discuss.aerospike.com/categories.md) · [Tags](https://discuss.aerospike.com/tags.md) --- ## [Impact of List Operations in Aerospike CDT: Append, Remove, and Update Behavior](https://discuss.aerospike.com/t/impact-of-list-operations-in-aerospike-cdt-append-remove-and-update-behavior/12132)
**Author:** [@Tamilarasu](https://discuss.aerospike.com/u/Tamilarasu)\ **Replies:** 5\ **Last updated:** [March 14, 2025, 12:09am UTC](https://discuss.aerospike.com/t/impact-of-list-operations-in-aerospike-cdt-append-remove-and-update-behavior/12132 "2025-03-14T00:09:22Z")
I was researching the impact of list operations—such as updating, appending, and removing elements—but couldn’t reach a definitive conclusion. Does appending to an existing list trigger a full list rewrite? From my … --- ## [removeByRankRange - not working with reverse rank as expected](https://discuss.aerospike.com/t/removebyrankrange-not-working-with-reverse-rank-as-expected/8641)
**Author:** [@Guni\_Atarya](https://discuss.aerospike.com/u/Guni_Atarya)\ **Replies:** 1\ **Last updated:** [July 18, 2021, 7:41am UTC](https://discuss.aerospike.com/t/removebyrankrange-not-working-with-reverse-rank-as-expected/8641 "2021-07-18T07:41:49Z")
I would love it if someone can address this issue i’m having: --- ## [Python client - Nested map, map\_operation.get\_by\_key fails](https://discuss.aerospike.com/t/python-client-nested-map-map-operation-get-by-key-fails/7405)
**Author:** [@Pradeep\_Banavara](https://discuss.aerospike.com/u/Pradeep_Banavara)\ **Replies:** 1\ **Last updated:** [May 7, 2020, 6:54pm UTC](https://discuss.aerospike.com/t/python-client-nested-map-map-operation-get-by-key-fails/7405 "2020-05-07T18:54:20Z")
I am just trying out this CDT/Nested map operation in Python but not sure where I am going wrong. Using the latest docker image for Aerospike in default configuration. Any pointers will help. I get this error: (-2, ‘Fai… --- ## [Inserting nested map](https://discuss.aerospike.com/t/inserting-nested-map/6585)
**Author:** [@vishal14101993](https://discuss.aerospike.com/u/vishal14101993)\ **Replies:** 1\ **Last updated:** [August 23, 2019, 9:50pm UTC](https://discuss.aerospike.com/t/inserting-nested-map/6585 "2019-08-23T21:50:05Z")
Dear team, I’m using aerospike-server-community-4.6.0.2 and aerospike-client-c-4.6.6 on Red Hat Enterprise Linux Server release 7.5. I’m facing some difficulties while trying to insert a nested map in Aerospike. Please … --- ## [Remove by reverse index range](https://discuss.aerospike.com/t/remove-by-reverse-index-range/3458)
**Author:** [@lo-fi](https://discuss.aerospike.com/u/lo-fi)\ **Replies:** 3\ **Last updated:** [March 29, 2018, 6:11pm UTC](https://discuss.aerospike.com/t/remove-by-reverse-index-range/3458 "2018-03-29T18:11:38Z")
I’m currently using a sorted map with a timestamp as a key, and trying to enforce a limit using an atomic map operation, keeping the most recent items. Unfortunately there doesn’t seem to be a way to keep only last X ele… --- ## [Actual limits of a SortedMap CDT](https://discuss.aerospike.com/t/actual-limits-of-a-sortedmap-cdt/4514)
**Author:** [@localhots](https://discuss.aerospike.com/u/localhots)\ **Replies:** 6\ **Last updated:** [August 22, 2017, 1:59pm UTC](https://discuss.aerospike.com/t/actual-limits-of-a-sortedmap-cdt/4514 "2017-08-22T13:59:27Z")
Hi there. We used to store very large sets of negative numbers in Large Lists, but due to a known bug we had to migrate to a new SortedMap CDT. I made a testing tool that populated a SortedMap with over 100K items, val… --- ## [Secondary indexes over CDT (LIST/MAP) (3.8.1)](https://discuss.aerospike.com/t/secondary-indexes-over-cdt-list-map-3-8-1/1314)
**Author:** [@huydx](https://discuss.aerospike.com/u/huydx)\ **Replies:** 4\ **Last updated:** [March 24, 2017, 1:03am UTC](https://discuss.aerospike.com/t/secondary-indexes-over-cdt-list-map-3-8-1/1314 "2017-03-24T01:03:26Z")
I’m using Aerospike 3.5.9 Enterprised edition, java client 3.1.1 (using within scala program). Recently, I’m using the secondary index with LIST, and perform many extensive read with the secondary index. The current que… --- ## [Multiple operations on CDT return the result of the last operation only](https://discuss.aerospike.com/t/multiple-operations-on-cdt-return-the-result-of-the-last-operation-only/3385)
**Author:** [@zingoba](https://discuss.aerospike.com/u/zingoba)\ **Replies:** 4\ **Last updated:** [September 20, 2016, 2:09am UTC](https://discuss.aerospike.com/t/multiple-operations-on-cdt-return-the-result-of-the-last-operation-only/3385 "2016-09-20T02:09:58Z")
Hi, We need to do multiple operations on a large hashmap bin; essentially, multiple get by keys. The keys are in no order lexicographically. So we send multiple get\_key operations on the same bin with different keys but… --- ## [Append is not o(1) new operations on cdt list](https://discuss.aerospike.com/t/append-is-not-o-1-new-operations-on-cdt-list/2509)
**Author:** [@jin\_dev](https://discuss.aerospike.com/u/jin_dev)\ **Replies:** 4\ **Last updated:** [May 12, 2016, 7:28am UTC](https://discuss.aerospike.com/t/append-is-not-o-1-new-operations-on-cdt-list/2509 "2016-05-12T07:28:01Z")
I am trying out new operations on cdt list with Aerospike server 3.7.3. I am trying out single element append operation on an existing list of length varying from 50K to 1M. What I am observing is that list append time i… --- ## [Getting UnsupportedFeature exception, CDT list feature is not supported](https://discuss.aerospike.com/t/getting-unsupportedfeature-exception-cdt-list-feature-is-not-supported/2936)
**Author:** [@dhanasekaran1980](https://discuss.aerospike.com/u/dhanasekaran1980)\ **Replies:** 0\ **Last updated:** [May 11, 2016, 12:16pm UTC](https://discuss.aerospike.com/t/getting-unsupportedfeature-exception-cdt-list-feature-is-not-supported/2936 "2016-05-11T12:16:44Z")
Hi, I am using Aerospike 3.7.3 and python client 2.0.1 Tested under single as-well-as 2 node cluster. Appending items to CDT (List) where each item it 1KB. Appending items till the record size reaches 1M. Then increm… --- ## [The CDT list set operation returned parameter error sometimes](https://discuss.aerospike.com/t/the-cdt-list-set-operation-returned-parameter-error-sometimes/2556)
**Author:** [@Vincent\_Lee](https://discuss.aerospike.com/u/Vincent_Lee)\ **Replies:** 6\ **Last updated:** [March 2, 2016, 6:56am UTC](https://discuss.aerospike.com/t/the-cdt-list-set-operation-returned-parameter-error-sometimes/2556 "2016-03-02T06:56:58Z")
By the document, If an index is out of bounds, a parameter error will be returned. Should the ListOperation.set return error or not while index is larger than the list size? I tried this API , under some circumstances … --- ## [Wrong data type returned when using aerospike\_key\_operate\_async](https://discuss.aerospike.com/t/wrong-data-type-returned-when-using-aerospike-key-operate-async/2550)
**Author:** [@jin\_dev](https://discuss.aerospike.com/u/jin_dev)\ **Replies:** 1\ **Last updated:** [February 24, 2016, 11:37pm UTC](https://discuss.aerospike.com/t/wrong-data-type-returned-when-using-aerospike-key-operate-async/2550 "2016-02-24T23:37:03Z")
Using Aerospike C client - 4.0.0 compiled with libev event loop and Aerospike server 3.7.3 I just trying out simple experiment. Append a “str” using new cdt list append operation and then fetching the same using as\_oper…